Sure, sounds like seizures, have you seen a doctor, if not, why not?
Deja Vu is a common symptom of my Temporal Lobe seizures, when I was having the seizure, it stared out as Deja Vu, progressed into memory disruptions, lasted about 15 minutes, left with with a mild depression and confusion that quickly resolved. I was always able to walk around, even drove (didn't know I was having seizures).
Over the years they grew worse, started to get aphasia (couldn't speak) and anesthesia of the throat. To this day, even medicated, I get seizure swallows (my term) as infrequently I swallow when I wasn't planning on it. Imaging my sulfide when I was gargling with Listerine and I swallowed it. Thankfully the instructions say to seek help if you swallow more than you would gargle with.
Feeling a sensation in your stomach and noticing an odor that isn't really there are symptoms of seizures as well.
So, why haven't you visited a doctor. As Thundercloud said, some migraine symptoms are similar to seizure symptoms. See a professional. I suffered for over 15 years without a diagnosis, and when diagnosed and medicated, my symptoms went away practically over night.