Advice please

Good morning,

I started working at this job since I've got experience. I'm 5 months pregnant high risk due to type two diabetes that being said having to take breaks to check my numbers and all. Ever since I've started working I constantly have to pee or sit since my feet are killing me. Everytime I as to go pee the manager yells at me and says no or when I'm sitting she yells at me and takes the chair from me. Then the store manager yelled at me for being sick and she sent me home. Has anyone ever been treated this way? What do I do? Everytime I tell my husband he wants me to just stick it out and push through it. I don't know what to do.