I'm 38 weeks pregnant when should I stop going to school?

Don't assume that you'll make it to 40 weeks. It's not uncommon to go into labor sooner - and at 38 weeks, you're already considered full term. One of my classmates actually kept coming to class even when she was full term - it just worked out for her that she went into labor over the weekend and not during class. But that's not to say it'll be the same for you.

I would speak to your professors just in case you decide to take time off now instead of waiting. You can keep going to class if you want. IF you choose to stay and wait it out, make sure you have a contingency plan - who's going to bring you to the hospital if you're in class when you go into delivery, etc. Labor varies for everyone so you could deliver soon after and some women don't deliver for 12-18+ hours later (after the first contractions).

What you really should be looking for is the contractions. I only say that because unlike the movies, the water doesn't always break as the first sign of labor - it usually breaks during active labor. It's also not uncommon to have the doctor break it if needed to help speed up labor.

God forbid your water breaks in class, and what?????? You go to the hospital and deliver your baby, just like you would at home.

Typically, your water will not break until you are well into active labor (if even then).