I'm an 18 year old female, weigh 125 pounds or so, and am about 5'7. I've had constant headaches for a while now, but they sometimes turn into migraines. I've had a large change in my personality, and am pretty much constantly sick and heave been for about a year and a half now. There is no (known) medical history of disease or disorder other than Alzheimer's, which I don't believe is applicable here. I'm not sure if it's related, but my ring finger of my right hand also has begun twitching, and whenever I look it's still going, and has been for months. Do you have any idea what could be wrong with me, or where I should go from here?