I am 47 also. Diagnosed in Nov 2019. I had my dose dense AC first and just had my 10 th taxol today. AC for some of us - me for sure - is tougher than the taxol but it’s over quicker and there are down days followed by really good days. The good days reassured me I would get through and be ok. Try not to read up too much because what you read might not apply to you. I was most afraid for my heart function also, and while it has affected me in a minor way (hopefully not forever) I still jog 4 times a week and a very small dose of medication has taken care of the problem. I will have regular echocardiogram for heart function which has so far been normal.
I have ( and still do) grieved for the changes to my body and health through this chemo but I know that it is necessary and I want to give it my best shot to survive for my children.
Hang in there. Talk to your breast nurse and oncologist every treatment and in between if necessary and be reassured that they will help you with your fears and by looking into any issue if it arrives. You have coped with the first drug every week for 12 weeks - you will get through the next 8 weeks also xx