Why do I feel Like I'm in a dream?

I had a car accident when I was 14, I am now 20. My head got ****** up pretty bad, we had a head on collision and i wasen't wearing my seatbelt. When we crashed all i remember was flying foward and smacking my head on the sun visor on the car and part of the windshield. I woke up in the hospital and i looked in the mirror and i looked like ****** E.T. The left side of my head was all swollen and soft and it looked like i had a football size lump on my head. They did a CAT scan i think and they said nothing was wrong with my noggin. Growing up i've been having these terrible migraines almost everyday since then, and they aren't normal headaches sometimes its parts of my head that hurts. Sometimes its the top, sometimes its the bottom, and sometimes like part of the top and part of the bottom part of my head and when i do get the headaches its like i stutter and i can't remember what to say or do or make out what i'm trying to say and i forget everything and its just so irritating. Also sometimes i feel like i'm not here or it feels like i'm in a dream and its a horrible feeling, kind of like when you're high on bud, but without the fun part its horrible and when i do feel this way i get like these small panic attacks and its crazy cause i don't know if its real or not and i feel like its dangerous cause i don't know what to do or say. One time i felt like this when i woke up and i got up not really knowing whats going on and walked for like 4 blocks down the street it felt like i was floating around and everything wasen't real but then its like i came back to reality and i realized....**** i'm in the middle of the street and i went back home, and its gotten worst over the years i've gotten older. Has anybody felt like this before? Anybody have gone through the same thing? I've went to the doctor and the dumbasses don't know what the hell they are doing or what i have? Can anybody help me out or tell me something that could help me out PLEASE I CAN'T STAND THESE FEELINGS ANYMORE, i feel like i'm going to lose my mind. AM I PRETTY MUCH SCREWED?