Needing support...

I work for Starbucks and am 20 weeks pregnant. Everything about my job makes every joint hurt on top of having some noticible mood swings that I try to keep under control. My boss doesn't cater to my needs (6hours between shifts, putting me in a position to be around chemicals and lifting heavy things) especially since I have developed a hernia. My coworkers are telling me that I'm acting psycho and that I need to stop "faking" being in pain. At first I wasn't upset. But having a day off to internalize this, I'm actually really hurt. None of them have ever been around a pregnant woman for an extended period. My husband is deployed and I have few friends here on top of finding a new home and doing this alone. Things are very hard and I'm very upset that the people I see everyday are telling me to cool out and stop being a "psycho." Am I overreacting??? I really would like some validation that It's normal to be a disaster.