strange sensation, aura? seizure or neither

[shawnalb1]

i'll try to make this short and sweet, i'm 40. began having strange "sensation" around age 11 or so. few and far between. as
i've gotten older i have done more frequently. last 5 years alot more. i have been able to pin down it seems to be before or
after my menstrual cycle. Best i can describe is a"familiar" feeling. i get like i can't believe this EXACT thing was said or heard again in the exact spot where i heard it last time, by same person and same topic. i guess you could call that deja vu so of kind. When i lstarted searching my sensations. Walla, seizure pops up. I can't believe this would have been a seizure all these years w/o knowing? I never knew what it was, and it never seemed significant enough to even bring up. sometimes i couldn't remember last time i did it. i feel very tired after, but don't shake, no headaches, no problems remembering after. just get really quiet and don't wanna talk. feel a it confused. that's about it. last maybe 30 seconds give or take. what the heck is this?! and last few months i know also get a change of the way things i like taste, pretty much mountain dew is AWFUL and i drink it all the time.
most foods don't taste normal so i just don't eat. it passes. i do this around the time of the spells... metabolic? any suggestions? i have passed out a time or two. went to er last time when i bent over in a book store , then squatted a bit while having one,
just hoping nobody would notice. i passed out. came back to within seconds was just fine. cat scan, normal, blood work, fine
ekg fine, chest xray fine.