So I'm walking thru the mall after being in the rest room having an upset stomach.. I feel better but all of a sudden it feels like me stomach was expanding.. felt as if the baby could have been stretching straight up and down but it lasted for a little while.. felt like an odd stretching, expanding pressure. But it didn't hurt.. felt tight... this is the best way I could explain it. Does anyone else experience this?? I'm just 16 weeks and 4 days.. what is that?? Lol