During sex a few days ago, I started bleeding heavily, and I assumed it was my period. When I got home I realized it wasn't my period and my vagina was a little bit swollen, but it didn't hurt. Now, a few days later, I took a mirror "down there" to check it out and the opening of my vagina (the part that looks kinda like a flower) one of the sides is swollen to about twice the size and has some dark red/black coloring to it (almost like bruising or something). What is causing this? It's sensitive to the touch, but doesn't really hurt in my daily activities. I can't even imagine having sex right now, I'd probably just bleed everywhere again...any ideas?