My question involves labor and employment law for the state of: Massachusetts
I am a server at a restaurant and had been employed there for just over a month when I received an emergency surgery. This surgery left me in the hospital for a week, and upon discharge I remained bedridden for two weeks thereafter. I was required to stay at home for a period of four weeks and was not cleared to return to work for another three weeks. I have documentation proving both my hospital stay and at-home recovery.
Less than a day after I was admitted to the hospital, I informed my bosses of my situation and was given well wishes from them as well as permission to take as much time off as I needed. While out of work, I emailed my bosses regularly to update them on my condition. They were informed of every step of the healing process. Once I emailed stating my intention to return to work in two weeks, I was asked to have an in-person meeting with my boss.
At this meeting, I was told by one of my bosses that my position had been filled while I was on medical leave, and they no longer had space for me on their serving team. The decision had been made weeks ago as they hired additional employees to work the shifts I was scheduled for before leaving. She offered to re-train me as a host, which is a similar position that would cause a large pay deduction, one I estimate to be about $200 per week. I informed her that I would not accept this position.
I am wondering what my legal standing is. I know the FMLA does not apply in this situation, but the director of my college's Disability Services Office wrote a number of official letters detailing my protection under the ADA, which required my professors to provide classwork accommodations during my leave. I'm wondering if the ADA also protects me from discrimination by my employer. I would appreciate any and all advice regarding this matter and how to proceed.

