Dizziness  4-3-08

Wow i am again plagued with horrible dizzy spells. I have noticed even when I am sitting down, I have the feeling of moving backwards and have trouble walking straight. I have dizzy spells before but they seem to be getting worse. I am wondering if my vegetarian lifestyle could be contributing to these symptoms. I have had a high pitched ringing in my ears that lasts only a few seconds. I have low blood pressure and I am beginning to worry.  anyone with any idea of what may be occuring please post a reply. Thanks.