I have classic migraines and have a horrible time with my memory shortly before, during and right and after migraine...I would imagine it would be the same for those with your same situation where you have the aura just don't actually have the same pain that follows.
I am going to put some info on from a few books I have read...I might forget to put it here as well...so keep an eye on the other posts about aura with no head pain, ok?
Email me if you have any questions?
Have you been to a Dr. for your migraines (aura)???