1st day back to work full time

Today my office made me come back to work full time.  Almost 4 years ago to the day, I started working part time.  I had the best schedule.  Last year the office wanted me to come back but I got cancer so they backed off.  17 days after my radiation treatments were over, they approached me.  I turned in 2 doctors notes but they pretty much said since I wasn't disabled I had to come back.  I was upset and I thought about pursuing it further but then I thought let's see how I feel after working 2 weeks and we'll go from there.  Time will tell.