Unsure?!

Hi I’m a second time mum, my first little girl had a dairy intolerance confirmed at 3 after repeated rectal prolapses and chronic constipation. Now with my second I’m starting to worry she may be showing signs of cmpa, she’s exclusively breastfed however is really struggling with gas, she seems to be straining to poo however it is very loose and watery (I’ll pop a picture in the comments)! Any advice would be greatly appreciated ❤️