Indication you're almost ready for labor

Haydn
Hey Mommas, what was your biggest indication you were going to go into labor soon? I've been having having to go #2 like crazy lately and have been having massive heart burn. I'm at high risk for early labor around 36/37 weeks, they didn't even think I would make it this far and I'm 35 + 5 today. At my last appt on Monday baby was staged at a -1. He dropped from a -3 to a -1 in one week. Just looking to get some input.