Nipple piercing

Soooo I got my nipples pierced back in October and had no problem with them. I changed the bar a week ago and had no problems except for a little bleeding (I know it was too early but I usually heal pretty quickly) I decide to change the bars again because they kept getting snagged and now I think they’re infected?? :( they’re super hot and slightly puffy and VERY painful like the slightest brush against them causes a lot of pain. Pls help? What should I do