Hi all. Really need your help with this. DS now 13 weeks and dropped from 91st to 9th centile in five weeks. I'm trying not to get too hung up on figures and HV has been supportive, not pushing for formula but suggesting I up number/duration of breastfeeds. HOWEVER on Monday we have another big weigh in and if he's not gained I have to take him to GP. Can anyone who's been through this tell me what happens? What do they look for? What test may need to be done? I'm trying to bf him every three hours during the day and then leave him 10pm - 7am max overnight but my supply seems to be a bit low at the mo, to the point where I can't even express any as I'm afraid I'll risk shortchanging him at his next feed (and it takes AGES to get any out - not usually the case). He's also totally rejecting bottles after being quite happy with them so expressing isn't much use anyway... Help anyone?