I agree w/ Ellen that you should notify your doctor before you take anything. It could be an inner ear infection and antibotics are needed.
I have had dizzy problems in the past. I had a prescription for antivert and valium. For some reason, the two togeather work. It was so bad one day while I was at church that I was holding onto the outside wall of the church and crawling to the car. Ended up in the ER. They gave me a shot of valium and w/in an hr it had cleared up. There are over the counter meds that you can get also.
But please check w/ your onco or physician first.
Good luck.
Deb