Belly Piercing Question!!

Hey guys! I got my belly button pierced almost 3 weeks ago, and noticed its been looking a little funny. I clean it with a sanitize wash (its a pressured spray super nice/easy to use!!) my local tattoo shop sells, and I know that belly button’s reject more since they’re surface piercings. I can’t tell if it is. It was red a little bit after getting it and went away for about a week and a half and then i accidentally caught the piercing on my jeans and irritated it quite a bit. Ever since then I keep accidentally brushing my freaking hand or purse against it & it’s been causing it to get more and more red as time passes. It is only a little bit sensitive. I refrain from touching it except when I’m cleaning it, but I just want to know if this could be from hitting it so much or my body is rejecting it.

My roommate said it could be infected, because the puss was a little off white (don’t mistake off white as yellow) which is a sign of healing. Its only a little swollen on the top.

Any ideas?

I’m going to go to my tattoo shop tomorrow and ask them what they think, because I wanna catch it quick if it is rejection.