I ate my lunch in the car on the way to a meeting - sandwich, fruit juice, grapes. Probably bolted it down, to be honest. After about twenty minutes in the meeting I suddenly felt very odd indeed - heart started racing, vision went very blurry and kind of 'closed in', felt very spaced out and light- headed, so I thought for a moment I was going to pass out ( have never fainted in my life). It gradually passed after a few minutes but even now ( an hour later) I feel shaky and my vision is still a bit blurred.
Any ideas? Didn't like it at all!