DS is 14mo. He had reflux early, which got notably less severe c 4-5mo, but he continued bringing up milk for quite a while after weaning. This seemed to segue c 10mo into constipation, which at the time I put down to an increase in formula (I was still bf at home) and/or an emotional reaction to starting 3 days a week at the childminder when it returned to work. That was in Feb, and eventually the poo softened but he was still very distressed trying to poo, often straining and whimpering on and off all day with no result, then screaming when he did poo. About a month ago (after he'd turned one and had been full switched from formula to cows milk for a couple of weeks) I took him to GP who prescribed Movicol. It worked, but he hated it and almost stopped drinking. I stopped putting it in drinks and switched to food. Then over the last couple of weeks or so he gradually stopped eating as much. For a week or more he's eaten amounts like one small animal biscuit, six mini Cheddars and a dessert spoon of Apple pure. Initially he was drinking more and more milk (morning, afternoon, bedtime, 1-2 bottles a night), then a few days ago he vomited prolifically including what looked like half a chicken fillet but I think was curdled/congealed milk. Now he hardly wants milk either, possibly half a bottle a day, and twice he has vomited the milk straight back up. He drinks lots of water. In fact is quasi desperate for it.
In the background he's had what feel like almost continuous colds and coughs, and tbh even when he is well his breathing always sounds chesty. When his temp has spiked I've taken him to GP but chest always deemed fine.
Sorry that's a long tedious history. I'm just concerned there's something underlying if not all then a group of these problems. Note is hugely serious but I'm getting very worn by the refusal to eat now, the endless pooing drama (I have a 3.5yo dd as well who has started getting upset and playing up) and the significant increase in the night wakings for the last few weeks (up to four times a night). Plus most of all I feel he's troubled but can't ask him why.
Am I making too much of normal baby stuff, or might there be something I should get investigated?
Thank you to anyone who has attempted to read this.