work and pregnant

I didn't know what to title this but I need advice. I'm 33 weeks pregnant and yesterday I went to the hospital because I thought I was having false contractions and I got dizzy, weak. nauseaus and sweaty all of a sudden. They told me not to go to work yesterday and to keep drinking water and to call the next day and get scheduled with the OB if I didn't feel better. I'm still not feeling better and the note for work was only for yesterday. Working wouldn't be so hard to do if it wasn't in a warehouse where I'd be on my feet for 12+ hours a night. So I called the OB and she basically refused to schedule me any earlier. I don't want to work because if I do I'm putting my baby in danger. but the Dr won't see me, and I'll get in trouble without a note at work. I don't know what to do😔