Is my navel piercing rejecting or just healing?

So I got my navel pierced on the 17th of May. I've been taking really good care of it as far as cleaning it goes (sea salt soaks once or twice a day and antibacterial soap in the shower). I've tried not touching it and have been doing well with that since I know you're not supposed to touch it with dirty hands (which is great cuz I'm a germaphobe anyway). But lately more of the barbell has been showing and I have been able to feel what I think is the barbell through my skin for a while now. The top hole is still red and it doesn't release puss (I think it's called Lymph) anymore when I clean it or in general really. I was wondering if this is normal? Is my body rejecting my piercing or is it just healing? I already went back to my piercer and he said it looks fine, just come back if you feel something is wrong. And secondly, are the barbells they use in the shop when they pierce you longer than usual? I still have the starter bar they gave me when I got it done and I was just thinking that maybe more of the bar is showing because the bar is longer then usual. Any help or insight is greatly appreciated.