I guess if it's making you crazy to not know what it is then you need to get over your fear of not wanting to know.
Uh, if you dont find out what it is, then you stay crazy. If you find out, you fix it. It's probably a yeast infection, but if you dont take care of it, it can get in your uterus. That is probably what the blood is, just damage to the lining of the uterus. I wouldnt worry. when you have your period it is also the lining of the uterus shedding. But take care of it now, before it gets worse. You are afraid to find out what it is, when it's nothing much now, but if you wait and its gets bad, you still have to find out what it is to fix it.