Hi, this is my first pregnancy I am 17 weeks, 4 days along. Before I got pregnant I was about 128 pounds not sure how much I weigh now. What I feel is normally about a inch under my belly button just where the public line lies or where low rise jeans sit. I feel it when I am lying down normally at night but sometimes in the mornings, occasionally if I'm slouched sitting. It feels kind of like a bloop, or a strange pop. This morning I was lying down and had my hand there habitually. I felt the bloop and i pressed on the exact spot with 2 fingers, then about a second later i felt it again, so i pushed on it again, and the bloop came back again. As a first time mom, i have no idea if it is or isn't but based on ur experiences what do you think?