No, I have not heard about dizzyness with flushing before. As we are all uniquely different, anything is possible I imagene.
I would recommend a lemon cleanse for as long as you are able, even a few days might make all the difference. I take protein powder instead of maple syrup for the lemon cleanse that works well for me. You might want to check it out on curezone under 'master cleanse'. Another option is to 'Ask Andreas' on curezone, he always responds promptly. Giz.