A Bit of Reassurance

Hi Everyone
I am 3 years post diagnosis - not mets anywhere in that time. I had a brain scan, abdo/chest CT and Bone scan 18 months ago - all clear. I had a bone scan in December 2005 for a persistent pain in my back - all clear. Even though i only go to the onc every six months now i feel like a whinger. Each time i have had what i thought were some suspect symptoms i have had x-ray/scans and thankfully all have been clear. My problem now is that i have been experiencing some lightheadedness/ dizzy spells - started out every few days and now every day at least once or twice a day. Whilst i do not want it to be anything wrong i am also reluctant to go running off to the doctor have a brain scan (find out that there is nothing wrong) and feeling like the boy who cried wolf. Has anybody else had symptoms of dizziness alone no headache or anything else and had it either go away or found out that it was something more nasty. Any suggestions. Thank You Janet