BIG Hole in my nipple??!

Okay so I've had my nipples pierced for two years and I've never had a huge problem with them. Now I was in the bathroom looking at my boobs (as one does) and there's a hole! I can see my barbell through it! I'm so worried what do I do?? Picture included in case you're brave. If not, looks like this @=(=(o)=)=@