Back labor?

What does it feel like? it's 4:52 in the morning and I just woke up to a sharp pain in my lower back, only on the right side right above my hip. Last night I was having period like cramps on and off but they only lasted a few seconds. I'm a FTM and not really sure how any of this is supposed to go so advice would be appreciated. I'm 37 weeks and 2 days. 😥😖