DS is 4 months, EBF.
When he was born (2 weeks late) he was 50th for length and 75th for weight, now he's 93rd percentile for length, and 25th for weight. He is happy, super active, meeting milestones early, plenty of wet and dirty nappies each day, and gains weight each week but not a lot. There have been weeks following vaccinations, mastitis, a virus etc when he's gained less. The pediatrician today said she thinks he's a bit slim relative his height and since he's gaining weight slowly wants to weigh him again in a fortnight. I'm worried she's going to recommend formula top ups which I'd rather not use (but of course would if it's best for him).
What can I do to encourage weight gain? I've started taking galactagogues and I'm trying to make sure I drink plenty in case my supply is low. Should I also try pumping (I never have) to ensure supply is up? Or giving him expressed milk as well? DS has always had short, frequent feeds at irregular intervals and often falls asleep on the first boob, then continues to suck on and off when asleep. Should I be waking him? Offering more frequently even without signals?
Both sides of the family are skinny and the menon my side are also tall so I tend to think it's just him, but I don't want to be blase and would feel more confident using or refusing formula if I knew we'd tried everything bf-wise first. There are no bf groups near me in the next 2 weeks but I could pay for a private lacation consultant.