Can I sue my job for this?? State. FL

So I have worked for this job for 3 months didn’t notify them I was pregnant when I started but as I got bigger I began to notice I was being mistreated..my doctor wrote a note saying I should be allowed a sit down break every 4 hrs for at least 15 mins. And can’t life over 15LBS to heavy for me. After this I was told to no longer come in I told them they can’t do that and they just removed me from my normal duties. Fast forward to now, they have now made it where I was working 4days for 8hrs to 2 days every 6hrs and refuse to give me a reason for it and will not give me more days they also will not help me with anything to high or heavy and tell me to just go home. What should I do??