I have a weird fluttery feeling in my upper right abdomen?

I feel that in different parts of my body sometimes (thighs, lower abs). I wondered what it was and searched around the internet but everyone gave a different reason soo i ended up just forgetting about it since it doesnt happen all the time. I fugure that it's from exercising for me because I do exercise and do abs so i think its like a muscle contraction or stress from exercising so much.