WHY DO I KEEP ON HAVING THESE BLACK OUTS?

I have the same kind of black outs you do. The last about the same length of time, and if I don't grab on to things I fall. I don't think that it's the fact your not eating enough, because I eat plenty and I still have this problem. I've been having these spells for years and I'm 16 now so I don't think they're going to go away on their own. Some people have said that it might be vertigo, which is a medical problem with your balance, but I've tried the treatment and it didn't work. So I really do think it's the fact that your not eating alot..There is a possibility that it might be low iron levels...But if I was you I would go to a doctor and get a professional opinion. Best of luck.