feeling dizzy....?

So the last few months I get random spouts of dizzy spells like to the point where I need to stop what I'm doing and let it pass. I don't have high blood pressure and I just got checked for diabetes, kidney infection and other vitamin deficiencies and just had a Pap and everything has come back normal so for the life of me can't figure out what is causing this. I'm 100% not pregnant either so it's not that. Has anyone else experienced this?