cyst. ick

so, I haven't said anything but laying here typing this is killing me.

A few weeks ago I noticed a lump about the size of a quarter developing under my left breast. It hurts a lot, and hopefully it's a cyst. I can't tell if It is movable or anything and I need to go see my doc.

It's either a viral infection that needs to be drained, or a cyst.
I don't think it has anything to do with breast cancer because "it hurts" (although cysts do harbor cancerous cells often) and I know it doesn't have anything to do with my period because I don't have it until the end of the month/ beginning of next month.

It's only on the left side and it feels swollen and throbbing and like someone is stabbing it if I brush up against anything

wearing a bra has become more and more painful.

Got any ideas?
j