Diagnosed 2 days ago

My advice on chemo is to take someone with you for the first and second doses. I was ok on the first one but terrified as you sound but they infused it very slowly and it took hours. I couldn't really concentrate on reading or talking with my husband but I did take a laptop, plugged into a point at the back of the chair (the chairs are nice) and put the lappy on a food table on wheels and wore a head set so I didn't disturb other patients. I put my favourite movie in the cd with uplifting music which made the time really fly by.
The second dose I had a reaction to it and it was so sudden that had my husband not been there and realized straight away, I would have been in more trouble. The nurse had just turned her back and for the life of me I could not press the emergency button. All was halted and more premed put in and the reaction went away. 
If you live 20 mins or more from the center, take a bottle of water for the trip home. My mouth suddenly turned in to the Sahara desert and my throat was dry as a bone. 
Other side effects apart from being tired just sort of evolve and you will get around those as they come. We are very adaptable but just take it one day at a time. I am hoping the chemo for you really works well and a lot of that chest muscle stuff just disappears. You aren't on the way out yet and shouldn't be for a long time so don't panic. We will help you with any questions no matter how odd or silly. We've all been there. <3