Regurgitating or possetting is not something to worry about in itself. Small babies sometimes have a weaker valve at the top of their tummies and it lets a little bit out. It could be from being full, but it could just be from the way he moves, lies, you hold him, etc. My DD possetted until about 7-8 mths. If he is taking the extra feed, by all means keep offering. If he isn't interested, then don't bother. Sometimes a bf is a great way to help him wind down, as well. He probably won't bf if he isn't hungry, but he'll only take what he needs. It might help him settle and he likes it. Who can blame him?!

Sounds like you've done a great job with him. I actually didn't bother taking my DD as a baby to MHCN check-ups after the first couple of months. We saw the GP for all regular vax and I was happy she was thriving. The weight on the scales is only one indicator of a healthy baby and it's notorious for being used to stress mothers out!