@roxy66
I was diagnosed 33 years ago- 1992- at age 48- and had a mastectomy.
Obviously, treatment has changed over the years.
I had chemo for 6 months. I was able to get all treatments on time and full dose. They check your blood counts before.
They do give you drugs to counteract bad symptoms. Mine were mostly GI and worst the day after.
Try to talk to a dietitian- your appetite will change and you have many food aversions.
I did not lose all hair- it thinned out.
Get as much sleep as possible.
One of my mottos later on was : I went through chemo, I can do anything!