Is it normal or a sign labor is close?

I have severe sharp pains in my upper thighs after taking a few steps and it causes me to stop in my tracks I've had it for the last few weeks but tonight it's really bad and LO is being very active and I keep feeling jabs in my pelvic/vag area. Possibility labor is close? Was due 8/18.

Was 1 cm dilated at my 36 week, haven't been checked since and lost my plug at 38 weeks.