For about maybe a year and a half now I have been expiercing some wierd sensations in the left side of my head in wich are hard to explain however I can say that they have gotten wierder as the times went on for example I had odd blood pressure feeling and feeling as if I was gonna pass out again only the left side they did not have some kind of pattern there were somtimes I didnt feel it like a day would go by then it would come back again wen I first started feeling,somthing it was just a pinch now however these symptoms have slowed down and I feel them less I did have an anxiety attack before I wonder if it has to do with that or my missuse of ritalin for my add well watever it is I hope its not cancer