Hi, may I answer your health queries right now ? Please type your query here...I am a 20 year old girl. Lately, I have noticed that I get shaky quite often. My hands tremble visibly, sometimes my knees shake, and my teeth chatter. It usually happens around 10:00 a.m. I have been in to my M.D., who acted very unconcerned. I feel tired alot. Sometimes after an 8 or 9 hour night, I feel like I could go back to bed and sleep it over again. I m not lazy, either! I m usually active, just seem to have less energy than I used to have. Also, I seem to drink a lot. Can be very thirsty. Sometimes, I stop drinking because I m tired of drinking, not because I ve quenched my thirst. I usually would drink at least a gallon a day, and sometimes 2 gallons, or more. Another thing is, I feel down, or depressed. Sometimes I go from having a very happy day into a mood in which all I want to do is weep. What s wrong with me? Am I going crazy??