Don't worry it takes a bit to sink in, we still refer to our girls even though we now have a little man in the house!

Ds has reflux too, I have eliminated a lot from my diet like you and we have worked out he is lactose intolerant. He is ok if I have a little bit of lactose free milk but screams with a2. He gets a rash when I have wheat as well. I have wondered about citrus too. By being careful with what I eat and giving him a lactose free formula as a top up he put on 260 grams in a week, before that he was on an av of 60g so nowhere near enough.

I am told he will outgrow the reflux as he starts to sit and then walk it should be all gone. Dd1 was lactose intolerant too and has improved and can eat most things.

I know lactose intolerance is rare but it looks like two of our kids have it, and they struggled to put on weight to begin with until it was eliminated from their intake.

Hope you can find some answers we are only a few weeks into the journey too.