DS2 is 16 weeks tomorrow and I'm bfing. He has had the odd bottle as I'm going back to work and felt introducing it would save hassle in the long run.He's not really keen on the bottle and prefers mummy. For the past week or so, he'll hardly stay on the boob for more than a couple of minutes before coming off and crying. Went to bf clinic, they watched us, said I was doing everything right, to help him calm down, put him on the other side and just keep alternating until he'd finished. Plenty wet nappies, poo's about 2x per week. DS1 had reflux, DS2 has recently started possetting a bit. I'm just concerned because his weight gain has slowed right down and he has a heart defect (coarctation of the aorta repaired at ten days old) and the HV's have started talking about paediatric referral. Any advice please?