Long question... for those who are already moms

I’m 37/38 weeks now.
With my daughter I didn’t experience much of “early labour” my water broke and that was it. So my question is what do early labour contractions feel like? Is it normal to have a stabby pain in my crotch? Lower back pain? Hurting to walk (a lot of pressure in the bottom of your stomach down to your crouch)?

I have an appointment with my OB Thursday and I called the hospital and the nurses just keep telling me unless there’s blood not to waste my time coming in... so I’m looking for some answers if possible.