3 week old weighed yesterday and still not returned to birth weight (born 7lb9, dropped to 7lb1.5 on day 10, yesterday 7lb8.6). FTM and something doesn't feel quite right with feeding, some days it is quite painful but then that clears and other days it feels as if my supply has dropped, so I'm worried that he's not getting enough milk. Several midwives have observed feeding and said that latch looks fine. LO will feed for over an hour and despite falling asleep, wakes and wants more food almost as soon as he's been put down. The last few days, and at night in particular, he has also started having long bouts of hiccups and grunting and he seems to be in some pain. Midwife did not seem overly concerned as he is alert for periods during the day and has plenty of wet and dirty nappies so they've just said that they'll be back to weigh him next week.
Can't help feeling that something isn't quite right and that I'm letting him down. Really want to get to the bottom of it and make sure he's getting the best start. Any advice welcome!