First of all, keep in mind that I am unable to diagnose you because I am unable to examine you, this forum is for educational purposes.
The symptoms you describe are most consistent with migraine headaches, but I would recommend testing to evaluate for temopral lobe epilepsy (less likely). Temporal lobe epilepsy (TLE) does sometimes present with and aura of smelling things and is associated with memory problems. However, TLE is rarely associated with headaches. It is possible that you could have both TLE and migraines.
To test for TLE I would recommend an EEG. However, the EEG is most helpful if you have a spell (such as one of your smells) while hooked up to the EEG.
As far as your migraines people with menstrual related migraines are often helped by long-acting triptans such as Frova and Amerge. These can be taken for the 3-5 days around your period to stop a migraine from occuring. A migraine preventative medication is a good idea, but many times patients need to try 2-4 medications before they find the right one for them. Others include elavil, nadolol, topamax, neurontin, lyrica, etc.
I hope this was helpful.
Take care and I hope you get some answers!
I gave this site out before, but it had crashed. It's up again and it is for epilepsy, but there aren't drs. to ask questions, just people with E. It is a very nice forum.
http://brain.hastypastry.net/forums/forumdisplay.php?f=144
There are alternatives to medicine.
Also on the MRI report was a finding of periventricular leukoencephalomalacia disease whatever that is I'm not sure. The Neurologist didn't mention that. So I am very anxious and nervous about this doctor's appointment.
Thanks for listening.
Lori in New Castle.
Cheers, J.P.