Other members have had episodes similiar to what you explained. It could be Depersonalization but I am not a professional so please do see your physician if this is a big problem for you.
Welcome to Healing Well and keep talking with us.
Kitt, Moderator: Anxiety/Panic & Depression& GERD Forums*~*
Welcome to the forum. I love your name! I'm not a professional so I'm not sure on this one, but I think dizzy spells are just one of those things that happen sometimes. Don't let it worry you too much if it's only happened the once. It may be a form of depersonalisation as Kitt mentioned but not likely to be a seizure. If it is worrying you a great deal then do see your doctor. Keep enjoying that bannana bread batter and let us know how you go.
BTW, it sounds like you are pretty darn good at controlling your anxiety. It's hard to "talk yourself out of it" that took me years to learn!