Contractions or baby moving?

C&G <3 • Whelp we are a comfy family of 4
Doc told me baby is pushing 8lbs😢😭😦 and that he is really running out of room. Being overdue sucks even more so since i cant always tell whats a contraction and what's just khan movin! Moments when he really stretches out my entire uterus tighten but then again it does the same when contracting. There are moments when i have lightening crotch but can't tell if its his head moving or something else. Same for back pain i know once or twice its been his hands (elbows?) Pushing into my back...... anyone else having this problem?