advice needed.. FTM and in pain!

Terri • mummy&Baby❤👶🏻
I don't Know if my girls maybe just leaning on a nerve trying to be comfy or what but my left hand side has a pain in it. It's like if you move the wrong way and it hurts.. that kinda thing and it's right where she normally kicks/prods her foot right out.. im not sure if it's just the stretching or my skin
Or what? It's not really sore it's just like uncomfortable sore, it's bareable pain. And I can feel what feels like her wee fist sitting there? Any ideas??