Bullying at work

So this is embarrassing. I work in a predominately male company and am 32 weeks pregnant. Though my company consists of 85% men, i work with many of the women in the company. My main boss has been consistently rude to me. He is male and it has been out of no where and going on for a-little over three months. My direct supervisor is female and she constantly riles my main boss up. She knows how to push his buttons and i feel like she’s doing that towards me. Once she dropped a binder under her desk and wheeled her chair out and asked me to go under her desk to pick up the binder. I was 5 months pregnant and just kind of stared at her... things like this have been building up and i feel like she’s running back and making me look like I’m not being as helpful and using being pregnant as an excuse. Point is i called my dr today and explained what is going on. I told her about the bullying and that i literally threw up this morning thinking about a presentation i had later. She said she can’t write me a note of any kind because i have nothing medically wrong and that would be fraud. Ok. I get that. I guess i don’t know what to do. I have awesome health insurance and have made it this far, i also get 6-8 weeks paid STD 60% paid depending on how i deliver. Am i being a baby? Others in my company cannot believe how i am treated and even my temp i am training made a comment about how they must want me to go into labor early with all the shit they ask of me. It’s retarded things. Lifting boxes unneeded, running errands that are out of my job description. I once called my dr because i thought i was leaking fluid and my boss ran after me as i was going to my appointment to ask if i was bringing my laptop. I’ve been getting Braxton hicks and i told my boss it’s getting harder for me at work trying to be honest and she laughed and said “who says that you or the dr”? My doctor called them Braxton Hicks and I’m not sure why I’m even asked that. My question being how do i deal? Does anyone have advice? Has something like this happened to anyone else? They are making me feel crazy.