Was this an aura?ive never had one before

so the other day after being up for awhile i had a spinning clear disk shape in my eyesight reasonably large.(hard to describe)everything in that area was spinning but clearish, outside the area was normal lasted about 1/2 an hour. its happened twice. When i used to get the mega killer migranes i never had that, and never during the 2 yrs of 24/7 vertigo until now so was that an aura??? :?

Based on what you describe I would bet a gazillion dollars you had a scinitillating scotoma aura. Click on this link (brace yourself - will make you feel uncomfortable) to see a range of scotomas.

http://www.google.com.au/search?q=scintillating+scotoma&hl=en&client=firefox-a&hs=4dB&rls=org.mozilla:en-GB:official&channel=s&biw=1280&bih=627&prmd=ivns&source=lnms&tbm=isch&ei=0U01To7FHOXTmAXWyYTwCg&sa=X&oi=mode_link&ct=mode&cd=2&ved=0CBQQ_AUoAQ

If that doesn’t work just do a Google image search for ‘scintillating scotoma’.

Sounds like an aura to me.