Medical discrimination at the workplace is against the law.
You can find more information at the US Equal Employment Opportunity Commission website. It is covered under the Americans with Disabilities Act (ADA). www.eeoc.com
As for the hysterectomy, as crazy as this is going to sound---it was easier to deal with than all of the darn tests I had to go through to find out I had cancer. The tests were a royal pain---not just because of the procedures themselves but it was the waiting....and waiting....test after test....wait after wait.
When I finally found out what I was dealing with and that a hysterectomy would up my chances of survival, it was a no-brainer. I told the doctor to sign me up, let's get it over with so I could move on with my life and no longer be stuck in this 'it-might-be-cancer' mush. I guess if anything at all positive about all of the testing is that it allowed time for me to decide how I was going to win and gather up my senses in order to formulate a plot.
The hysterectomy was the easiest operation I ever went through. Mindset is everything. I know a lot of times people hear that phrase out of someone dealing with cancer, that 'mindset is everything' (or similar phrases like it)---we hear it so much that it begins to sound like a cliche. But, until you've been there (either as someone dealing with cancer or a caregiver), any other person might not fully appreciate what that phrase means. It takes on a whole new life when your test results come in and they are positive.
Best of luck to you....and look up the ADA information. What your employer is doing to you is absolutely heartless and down-right insane.