34 week cramping

Baleigh
I'm having sharp cramps like period sort of but no lower back pain. I'm feeling nausea like I want to throw up. What if my water doesn't break, how do woman know they're going into labor? He's been so crazy active the last 30-45 mins and then all of a sudden I got these pains and nausea. Could he be dropping into my pelvic area?