First, a little background. DD (now 16 months) was entirely ff from 3 days old. She was a very sicky baby and used to projectile vomit after every feed. She was never in any pain or discomfort and still gained weight, albeit quite slowly. HV and doctor agreed there was nothing wrong with her and she eventually outgrew it.
DS was born 7 weeks ago and is bf. He had prolonged jaundice so I had to wake him every 2 hours to feed. He was discharged from the hospital at about 4 weeks old as the jaundice was clearing so I've been able to demand feed ever since.
He feeds often, with no particular pattern, and very quickly, rarely more than 10-15 minutes at a feed but I seem to have a lot of milk and quite a fast let-down so maybe this is long enough. He is winded after every feed and almost always does a burp but he still seems to have trapped wind. He's a very 'farty' baby.
He vomits quite a bit, after every feed and often inbetween. Sometimes it is 'fresh' milk and sometimes it ts very curdled. For the past week or so, he's sounded very congested but it's like it's at the back of his throat iyswim. Sometimes he vomits up some of the mucous. He coughs quite a bit, both during and between feeds.
He's now doing 2 or 3 dirty nappies a day, which are mustard yellow, but have recently turned very runny and slimy looking. When he's trying to poo he's extremely uncomfortable, often crying in quite a pained way, until it just explodes out then he's fine.
He's become very fussy, it seems like the only place he's comfortable is when he's upright on our chest, sucking on our finger (he seems to have a constant need to suck). I've tried him with a dummy and although he will sometimes keep it in for a couple of minutes, it invariably falls out and he starts crying again. During the day, he sleeps either in his bouncy chair or propped up on a v-cushion. At night he goes in his Moses basket (on his left side as it the only way he seems comfortable) which is already tilted but he usually ends up in our bed. He's not really sleeping for more than 2 hours at a time at night and an hour at the most in the day with catnaps of 15-20 minutes. Last week he often went 4 or 5 hours at night.
Despite all this, he's gaining weight well. He was 6lb 3oz at birth and is now 10lb 6oz. He gained 1lb 13oz in the past 2 weeks and his record is 1lb 4oz in a week. I've tried infacol which didn't help and am currently using gripe water but I can't tell of it's helping or not.
Does anyone have any experience of this, or any idea what could be wrong? Is it worth a trip to the doctor or HV or will they be uninterested as he's still gaining weight? Sorry for the essay