Me and my daughters dr thought it was reflux for 11m but once we switched to soy she was fine shes now on pea protein milk
My babe developed a pretty severe nappy rash and was inconsolable from tummy ache so was crying constantly. Got better overnight after switching to lactose free formula
Reflux was the first sign at week 1 and explosive nappies we didn't realise were related. No other rashes or symptoms at that point, everything else arrived after. Took us a long and traumatic 3 months to be diagnosed after being dismissed that everything was 'normal'. My friends babe's only symptom was wind and not being able to be put down/ sleep independently, took until 8 months to develop the rest of the symptoms, i think it can be a quick or delayed onset. I think they told me mucus can be normal but not in every nappy. Hope you get answers asap xx