The ulcers can cause the bleeding, as well as Endometriosis, but there would be asource and your gyno doctor would have seen that so I will rule that out.  You didn't say, so I'll ask, have you been tested for Herpes?  If not you should as this could explain a lot and your doctor will know how to treat you (remember, your doctor works for you, not the other way around...ask for the test to be run if it hasn't been!). 

 I was just looking for some help and I saw your page.  I was just in the hospital on saturday evening due to a vaginal laceration.  I have had ulcers in there lately also.  I had emergency surgery 

because none of the doctors could find the bleeding site.  I laid there and bleed from 11 33 pm till 

4 00 am required two units of blood. i have a lot more wrong with me but this is my pressing  problem and the sutures are already out.   not good.  I have purple areas flat on my legs 4 of them. What does this sound like to you my doctors are clueless and i"m 35 married 2 boys.  

I don't know much about this, just that it is a sack with cerebral spinal fluid in it and that is about all, but I do believe there is a resource here on this site ( click here).  Hope this helps and hope you find what you need.  Best of luck.