4+2 & already stretching sensation?

Alexandra

I’m only 4+2 and I’m already getting the stretching/pulling sensation in my uterus multiple times a day. I don’t think this happened with my first pregnancy until much later. The pregnancy ended at 18+5 and even then my stomach was still practically flat. Is it because this is my 2nd pregnancy or could this be a sign of twins possibly? They run on my mom’s side.