I am a usually very healthy 26 year old female. Rescently I have had many unusual symptoms. I keep blacking out, getting light headed. My hair is thinning. The left side of my face is tingling, burning, hurting and numb in spots. My left arm is weak, and tingling. My vision is blurry or missing spots. I have shooting pains all over my body. I keep getting throwing up. Im very tired even with a lot of sleep. The other day my arms were all shaky and I couldnt put them where I wanted them to go.My Dr. Has run all the test and has said there is nothing wrong with me. Is this all in my head.