Working with severe pain! Help me

So today I started my new job. Well I work about 7 hrs and keep throwing up from the pain of standing up, lifting 30-50 pounds every 30 min. When I got off I came home and just hit the couch and started crying my eyes out and puking. Then an hour or so ago a big clot of blood came out of me but then I stopped bleeding but the pain is still in my lower back and stomach. I honestly dont know what to do. Please help.. there isnt no way I could sit down or take a break. I dont think I can do this again but I dont want to be a "quiter"... I have no clue what to do and I'm supposed to be at work at 8am. I also have pcos and endometriosis.