I'm sorry you are going through so much right now. Although I cannot tell you if you have a split personality or not, I can completely relate to what you are going through. It is terrible to feel all alone. Also, depression can be the cause of your failing memory, not just another disorder.

It's not a good thing that your mom keeps cancelling your appts because it sounds to me that you really need them at this point. Have you told your mother what is going on with you and that you desperately need to see your doctor? She needs to know that you are in need of immediate therapy.