I had several several episodes of vertigo that lasted only a minute or two over a period of several months when this began for me. Now I have occasions of a milder dizziness. This comes and goes. When it is present, it can get suddenly much worse if I get upset. My 8 yr old son has experienced the same strange thing. Other things can cause dizziness too, but since it began when the BFS began, I've suspected it's related.