2 days ago, driving, unstressed. No warning, felt a kind of "ping", everything surreal for a while, like a wave over me. Really had to think to keep driving, stopped to rest. Like I was "there" but all else was a "film"; unreality. Clammy too. Brain felt too large for my scull i.e. like a pressure not a headache. Legs felt weak. Soon passed and I attended 3 business meets. Next day felt strange, not too bad but it all came back again. Went to Doc, had ECG which was A1, blood pressure high on the first check (nervousness?) but subsequently (x2) is normal. Have had a blood test