Someone tell me what to do!!!!! Help

I'm 99% sure I'm having contractions right now. I'm 37 weeks tomorrow and holy SHIT. THIS IS PAINFUL. my water hasn't broken, and the top of my stomach doesnt get hard. all across my pelvis, and my entire stomach gets hard and it only lasts for maybe a minute and a half. it peaks and goes down . doesn't matter if I'm sitting or standing or what. they're about every 3- 4 minutes.

if I call L&D; they're just going to tell me to wait until my water breaks. what do I do? what is this? help.