Belly tightening only on the right side (34 weeks)

Hi mummies, I felt belly tightening on the upper half of my abdomen but usually only on the right side. I can visibly see that there’s a right side of my abdomen gets tighter and there’s like a small bump before it goes away in 5-10 seconds. This happens for like 10 times a day. Anyone has similar experience? I’m currently 34 weeks! #firsttimemom