Ok so bubba is almost 4 months and for a while has been having pretty horrendous nappies. He's fully bf, but the nappies are very mucousy brown/yellow. He appears to have tummy/bowel cramps and has started squirming while feeding, pulling on and off. He's gaining weight well and doesn't appear to have any rashes or skin problems to indicate allergy or intolerance. I have heaps of milk, so he's definitely not going hungry.

He doesn't vomit, generally is pretty happy but wakes often from day sleeps with tummy cramps.

I'm lost! I don't know whether to try and elimination diet, give up breastfeeding (absolutely a last resort) or to take him to a paed. It's not like he's screaming in pain but he's obviously uncomfortable and the nappies sort of indicate something isn't right? Any ideas or experience?