hi there! i am also the mother of a 4 month old swcah son who weighs 18 lbs!!  feel free to email me anytime. my son’s 17ohps have been low, but he is only on 3.25 mg per day right now, so we can t go much lower. it does seem as though your son is oversupressed, but i dont think being heavy goes along with that. it would be the opposite, so maybe his weight is just him?? my son likes to have big bottles as did my non cah girls so dont worry too much about the weight right now is my thought. the 17ohp issue and BO are probably bigger concerns.

louise