Twitching by upper rib cage

I’ve been feeling some twitching all day right by my ribs towards the center of my chest and i can’t really tell if it’s my body or if it’s baby tickling me with his feet or hands?! It’s sort of driving me insane - there’s no pain or anything I just can’t differentiate between it possibly being my own muscles twitching or him moving around. Any other of you ladies dealt with this?