What is wrong with me?

I think I have a medical problem, I’ve been looking at symptons and I think I may have DID (dissociative identity disorder) or something similar as I have a lot of the symptons. please help! here are the symptoms I’m experiencing: major depression periods lasting 1-2 weeks at a time, in times between these deppresion periods I have spikes of depression for no reason, insomnia, unexplainable pains usually in joints, back and stomach, frequent migranes, very bad dreams of death/self-harm and horrible experiences (usually about being sexualy abused because that happend to me), when I get wound up/put under pressure the room starts to spin and my eyes and head hurt, unexplainable phobias of Moths and flies, when I get panicy when a moth is flying round me/attacking me I see little moths quickly fly by even tho there is only one moth in the room, I think I have 2 personalities (one is sweet, kind, caring, calm, quiet, simple, no sex drive, co-oporative & the other is very aggresive, in your face attitude, high sex drive, no respect for rules/the law, rebellious, very gobby, sarcastic, crazy/hyper, very vain, trashy & slutty, snappy, purposly break things/litter for the thrill of breaking the law)