Fatigue/long term side effects

Got my thyroid checked and its fine. I do sometimes have a potassium deficiency and I take a supplement which helps. I have low resistance to disease and low drug tolerance so its a bit of a balancing act sometimes. If I was 10 or 20 years older I could blame old age but I am not there yet. :P

Interesting BTW on your post @Romla about anaesthetic remaining in your system.  I don't know if that's true or not, but makes sense.  I had a hairdresser, years ago, who asked me quietly if I had recently had surgery as my hair showed signs of anaesthetic.  I had had surgery, one that I had kept quiet about as it had been for problems with an early miscarriage after an unexpected (but wanted) pregnancy.  She told me that anaesthetics affect the hair for months.

@KathleenT
 wondered if this post might help answer some of your questions on your post. 

@ Brenda5 Gee I didn’t think of possibility of anaemia and should have as was an issue for me with a very late twin pregnancy. Anaemia can I gather either be iron deficiency or folic acid deficiency. Iron absorption can be enhanced with the presence of vitamin c - I had to drink a large glass of orange juice everyday for 9 months for this reason.Also whilst my anaemia “horse “ tablets were prescription only you can buy over the counter at the Chemist FeFol tablets which cover both types of anaemia. That said a check up at your gp might be a good idea to eliminate anaemia and thyroid problems. That said I agree with @Afraser fatigue has a way of catching up with us after the adrenaline surge we use during active treatment.I had 20 hours of surgery last year - not all bc - and a friend pointed out the other day that that could explain why I get tired a bit lately as the anaesthetic is still in my body.

Some very good suggestions from others. Being "over" active treatment actually gives your mind and body time to catch up - and feel exhausted. While it's all happening, you are very focussed on everything that has to be done, adrenalin keeps you going. Even if you think your side effects are light, your body still gets a battering. Your previous "normal" was probably pretty hectic too! So getting back to it is difficult. Good suggestions to check your thyroid and iron levels. Sleeping tablets for a short time may help you recover a normal sleeping pattern - over tired people don't fall asleep easily. Best wishes. 

@Brenda5 just a thought - have you had your thyroid function checked? I know quite a few post menopausal women now with underfunctioning thyroid glands who are on thyroxine - my impression is we may be prone to this after menopause.

I am 2 years post chemo. On rare occasions all my energy returns for one day and I get in to all the stuff I can't do when I am lethargic. I wish I knew how to get more energy days but at least a few give me a glimpse that I will one day return to normal. 
Watch out for the dreaded depression as that really saps your strength. Exercise can help but its a catch22 in getting the energy to do the exercise.
My SVT heart troubles lately and the heart meds do drop my beats per minute down in to sleep levels which makes me tired.
Get a blood pressure machine that does the beats as well. At least I can see on the monitor why I have no energy sometimes. It does come good though. I just have to pick my battles (activity) according to what my body says I am up to doing.
Good part while I am on this medication is coffee is actually GOOD for me and gets my low heart rate up a bit. Silver lining to everything. :)

@Laura81 

Here's a link to a factsheet from the BCNA website - hopefully it will help and also show you that it is part of the journey 

https://www.bcna.org.au/health-wellbeing/physical-wellbeing/fatigue/

With a child that age and a single parent, you're going to be shattered without the lingering effects of bc.  Is he/she eligible for kindy/preschool - if so, get there.  If not, investigate whether your local kindy has occasional care (something like pre-kindy but not as regular or structured).  I know that at that age, mine were bored.  Also investigate local groups (and they'll have different regional names) like Music and Movement, Play Group, Kindergym.  We had a wonderful local off-the grid playgroup set up just for exhausted parents where the carers and members would take the child over to the play area and hand you a cup of tea and cake.  I went to that one for 7 years and only missed a day when I was in hospital.  And if you have to and have them to call on, ask for help from friends and family but if you can be sassy enough - on a regular basis so you know where you are.
Unfortunately, ABC in their wisdom changed the time of PlaySchool a number of years ago but we taped it to suit.  It really was the best babysitter as it was so interesting for that age group and actually floored us with some of the questions that came out of it - the forerunner of interesting discussions in the car and around the dinner table.  If you're having trouble with quiet time (include in that, nap time for Mum) there was a CD we found very useful - Baroque Masterpieces - no singing and apparently some of the pieces have been show to have a calming effect on the brain.  It certainly worked for our 4 yo at the time.  When she was overwrought she would ask for the "fairy music" as she called it.  My son, on the other hand, loved his K-nnex and Lego.  When his brain started spiralling, by that age he had learned to pull out his Lego and construct.  My youngest would just pull her "blue" rug over her head and was "not there".  They're all different.
A lot of what I have said is about managing this pre-school period with your child, not about fatigue post-breast cancer treatment as I'm not yet in a place I can talk about that.  However, this time is exhausting anyway - your child, delightful as he/she is, is bored and demanding because he/she is ready to burst out into the world.  Come school time you won't get the fabulous amount of time back that you thought you would but it will be manageable.
If you think the fatigue is more than that, I would see your GP - there might be other strategies.

I had an over active thyroid and was exhausted as couldn't sleep. A problem I've had since late 30a and still battling on and off in that time. I am again under treatment to supress. Either way causes issues.