What mental disorder might I have?

I think you should get a complete check up. Sometimes people can experience "mini-strokes" and not know it. It can explain some of the memory and articulation difficulties you are having. If you have medication please take them because they are there to help you. If you are hearing voices and/or thinking that people are telepathic it is a sign of some psychosis so please get to a doctor soon so that they can tell you what is truly going on. Good luck!