Poop stress help!

Hannah🇬🇧

Let me start by saying I am taking little lady to dr tomorrow.

So Callie has always had rather runny poop but always seemed well in herself but does suffer colic. She was on aptimil up until she was in hospital for another reason completely and they gave her cow and gate as that’s what they had and her poops seemed to firm up abit and she didn’t seem as sicky so I swapped her over. Her poops have been thicker for about a week but then these past few days they have gone to this....

Very mucusy! She is teething but don’t think that can cause this much runny poop with mucus. Any thoughts? Xx