Once when I was younger, I was in the school band, I played cymbals and drums. We were practicing "america the beautiful" which has a large cymbal part. You dampen the note with your body. Men do it with their chests.

Well I was going really hard at it, focusing on getting my timing right. And SMASHED my left boob in the cymbals trying to dampen the noise. The bruise took 3 weeks to leave !!

Hope you feel better soon. It's one of the worst places to get hurt.