Casey,
So sorry to hear of your trouble. Smilieshugs3
I have heard of those type of cysts, and it's definitely something the doctor should check out soon. If your doctor won't do something about it, then go to another, esp. since it was filled with blood. I wouldn't wait too long to see someone about it - doesn't sound that normal, esp. when it's gotten bigger. I'm not a doctor, but if it were me, I'd be going to doc immediately and getting something done about it.
Wishing you luck with this and keep us posted.

Nadia, 41
Fibroid Resection and NovaSure 10/1/2010