Need advice! Labor??

I am 37 weeks. The other night I was getting intense pain in my lower abdomen and extending to my lower back. I thought they were the start of contractions but they only last a few seconds and are very frequent but it's with her movements. It lasted about 20 min then stopped. I am having them again right now but again it's with her movements... I don't even know why contractions feel like. Anyone experience this??