Braxton Hicks contraction at 15&6

Is it too early to have these? Today I kind of felt some 3 different discomfort in my uterus area. They were on both sides. And really irregular. Kind of felt like a cramp maybe.

Also you know the pain in your side you get when running and you’ve overdone it. I had that pain in both sides but a little lower.

Then I also felt like there was air in my uterus or stomach area.

Can someone please help me make sense off all these.