Hi Kirley,
I know exactly what you mean. I have it up right at the top of my bump sort of under my boob's which made me think it was heartburn but it's not associated with eating. I get it at really badly at night usually on the side I am lying on which makes me move to the other side and then it starts there. My ob said it's just the skin stretching.
Hope that helps, it's definitely not pleasant.