I have/had a painful growth on my nipple for the last few days, it looked a lot like a pimple with no "white head", tonight I finally had enough of the pain and I popped it in the shower, it took a while, and I was squeezing out blood and thick white chunks from the "growth", now I'm still in pain and the lump is still kind of there. Should I be worried or is this likely just a pimple and it'll just kind of go away soon?