Dissociative Identity Disorder

Does anyone have any experience with this? I've come to believe that it's very likely I have this condition. I've recalled countless times in which I have forgotten days, and even entire weeks. The weird thing is that, being it's school, I've known the information taught, and been able to ace the tests given on the subject I didn't even know we were on. I always had to ask people around me what we had been studying, just to jog the memory of information I had absorbed.

I obviously don't have it as bad as some, but it begs to wonder what all is really me, and how I can keep myself as one person. This condition explains why I became a vampire for a few months. I actually was experiencing it all, and couldn't help it. I had (from stress btw) developed this alternate personality, which was very self-abusing in the area of biting, and was not mentally stable in any regard. I suppose when I broke free, I essentially destroyed this personality and began anew.

I suppose I'm just looking for some kind of support. This is the last piece of my puzzle that finally makes sense. The unexplained loss of memory, which I never even suspected was another personality or personalities taking over. Now that I'm aware of it, I hope to monitor it. I have been remembering everything since I got rid of the vampire. Maybe I'll stay one person now, but that's for time to decide, I think.

((oh, and I of course, can't see a doctor. This is America, and I'm 1, not old enough, and 2, I can take care of myself with proper guidance))

i forget days and weeks and forget what i do in them all the time. as far as you having this, its a possibility or it could be some other simple things or a combination of simple things like sleep deprivation, your doing to much and cant remember some of the small details.
most people under a large amount of stress or pressure or even depression(trust me i know i know the latter...) will naturaly absorb energy because their bodies cant take it in or hold it in for some reason or another. wich would be "temporary" vampirism.(whole different story from Asetians btw). and once the problem is resolved the vampirism will fade. but some people are stuck with it(new age vampirism) and the lucky few that this happens to might awaken to be an Asetian.
but still the loss of memory might be either something deeply metapysical or simply mundane. meditate on it

There are many places that could help you with talking to someone and or medical treatment for almost nearly nothing. Do you live with your parents? alone? These are all factors that might help. This site has some links that might help you. Since your underage, these kind of services might be free.

http://mentalhealth.samhsa.gov/publications/allpubs/stateresourceguides/Indiana01.asp