Stomach cramping during pregnancy

I noticed on my left side next to my belly button I have this cramp feeling. It feels like if I had gas that’s stuck on there. It feels like if I did exercise and drank some water and caught a cramp type of feeling. Whenever I try to pass gas that feeling is still there. It’s not painful but it’s noticeable and annoying. Is this normal when your 15 weeks 1/2 pregnant?