I started having them at 19 weeks lol...I thought I had to poop really badly because I didn't know what they were Lmbo
I'm wondering that too cause i told my doctor about some pressure i had in my stomach one day, and it went to my vagina after and he said it was probably just a contraction and didnt seem worried or anything like that. I thought they were only common during your second, but its my first. Sorry I'm no help lol