Hi. Just a second ago i got a dizzy spell and a horrible nausea feeling. I've had a bit of blurry vision since this morning, and guess what! Here i am going out of my mind with worry. I work in an office using the computer all day and i am also supposed to wear my glasses when on it and i dont really. Could this be caused by this? Im really starting to panic. Can anyone re-assure me please? Brain tumor thoughts are back. Thanks x