Stressed out and pregnant

I'm working at a job for that has been so disrespectful towards me, i've been there for three years but it just started getting worse as of last year. everything is never enough. They treat me different from others I've been blackmailed, the support managers talk about me behind my back to other coworkers... They put me in areas making me lift very heavy things knowly I'm pregnant an told me I Will have to get restriction papers from my doctor but I won't see my doctor until eight weeks.. I've been trying to find another job because being pregnant and being stressed isn't good. I've thought about taking a 2week leave because I'm so tired an burnt out. I don't know what to do.