Upset stomach?

Sa

My stomach has been feeling like it’s upset on and off for a couple of days. Bathroom habits are normal and it’s not terrible sometimes it’s in the morning and sometimes the evening.

I’m 29 weeks and on omeprazole for acid reflux. I’m thinking maybe it’s just my uterus stretching? But it’s up by my stomach (under my boobs) and sometimes lower by my pelvis.