Hi and welcome to the board.
I get exactly the same thing as you have described (EXCEPT THE HEADACHES). They are petit-mal seizures or simple partials. The first few years they lasted about 5 seconds and now about 15 seconds or so.
I could be totally aware of what's going on around me but I can't respond or I "freeze".
I totally agree with Jennifer-SEE YOUR DOCTOR. Don't let it go or you could run into serious problems later.
I'm 49 yrs. old and have had epilepsy since I was 21 yrs.
It started with only one major Gran-mal seizure and ever since then (1979) I would get these petit-mal's at first about once a month then a few years later, more frequent, then weekly and now daily (sometimes more than one a day) and it becomes more frequent as I get older. My EEG and MRI show that there is epileptic activity in my lower tempral lobe. That's why I'm still on meds after all this time.
My neurologist says it's like an insurane policy, if I didn't take my meds, these petit-mals would turn into full blown gran-mal seizures and I would have also had my drivers licence suspended.
Can you think of what may be triggering these "events" such as flashing lights (from emergency vehicles), certain music or noise, strange smells, PTSD, computer monitors, genetic, head injury etc.
Oh yeah, there is still something I'd like to add.
As I mentioned before, it gets worse as you age, my employer of 30 years recommended that I go off on Disability. Well I've been off for a year so far and i have not had one petit-mal.