Mono is highly contagious. If you drank out of someone elses glass that has mono, or kissed someone that has mono, it's almost a guarantee that you will get it.
Stop asking these medical questions on a computer forum, are you looking for sympathy or something? You're not going to get it, all people are going to tell you is that you have AIDS or you should see a doctor. Why dont you take yourself to the doctors? Why do you need your parents to do it? You dont, make your own appointment, and go yourself.
Perhaps you have the EEE (Eastern Equine Encephalitis)... Get bitten by any mosquitos lately? It causes swelling of the brain, which could account for your inability to remember things.
Or perhaps it AIDS. Sharing a dirty needle with someone could give you AIDS, and the stuff contained in that needle could account for your inability to remember things or walk straight or anything.
Again: Stop acting like a chick and looking for attention and sympathy, why would you do that in a forum anyway? Doctors, or just stomache it and shut up.