Signs of labor?

37 weeks pregnant with baby #2 this week. I went to the doctor on Monday and was already 3 cm dilated and 80% effaced, so it could be anytime really. I’m starting to get REALLY nervous and anxious! I was induced with baby #1 at 37 weeks so I never went through the classics labor signs. What should I be on the lookout for (other than water breaking and contractions)??(Slightly panicking because I know it’s coming soon)