Hi Doctor.. I am a 19 year old perfectly healthy female...i just have a question about something that has been going on recently. On July 26th of last year i was laying down to go to sleep and i got a strange feeling in my head. This feeling was not dizzyness but almost a tingle in my head and had some lightheadness type feeling with it. This feeling stayed for a few days and more than anything made me very scared. Along with this feeling in my head i also felt tired. There was no weakness involved i just felt like not getting up. At one point a few weeks later i got so scared i went to the Emergency Room. There they did blood tests, urine test, and a CT scan...all of which came back normal. THey did an IV then i wenthome and felt fine for a few weeks. Then all of a sudden the feeling came back. I went to my Family Doctor who did a thyroid test, B12 test, other blood tests, and EKG..all of which were normal. This feeling in my head is very hard to describe which is why i told my doctor it was dizzyness (i have NO spinning at all). He sent me to an ENT Doctor thinking it was an ear problem, but i knew it wasnt since it wasnt that kind of dizzyness. THe ENT did tests, ear pressure, vestibular balance test...all normal. I went back to my GP who put me on b12 supliments since my b12 level was approaching low...the levels went up so he took me off. I also just had an M.R.I of the brain which came back perfectly normal. This has now been going on for about 3 months (on and off), i also experience some muscle twitches but very rarely and only when i think about it. I noticed that ill have the feeling and tiredness for about 3-5 days, then i will be fine for weeks. I was so scared this was something horrible like M.S but since all tests keep comming back fine, i am starting to be relieved. He says it is most likely stress and anxiety...could stress and anxiety really cause all thse symptoms? Is that what you think it is or something more serious?