Sorry, need to vent!

38 weeks and still working full time, on my feet for 8+ hours a day. Just had an enormous wave of anxiety wash over me, I can't sleep and am dreading this week so much it's bringing me to tears. Work is short staffed (multiple people on vacation at the same time) not to mention that one of my co-workers is literally due the week after me and I'm not sure how we're gonna fair if either of us goes into labor. We have zero control over the schedules and the managers seem to think everything's peachy and acting like we aren't that close to popping. I'm so frustrated and stressed. If I could afford to I'd just quit at this point. Any advice, kind words, something? Help!