First happened a few weeks ago when I was on the tube, suddenly started feeling very light headed and dizzy, ears ringing etc which are signs that I'm about to faint, so I had to crouch down and bow my head forward until I felt better. At the time I put it down to the fact that I'd been jogging/semi power walking (for a specific reason, not exercise) and the tube was quite hot. But last night it happened again when I was at a friends house. I was feeling light headed again so sat down but it didn't really make me feel any better so I had to excuse myself and go and sit on the loo and put my head between my knees. I wasn't particularly thirsty or hungry at the time although it had been a little while since I'd eaten, the room wasn't hot, I really can't think what triggered it!
I'm 16+4 today, my blood pressure was checked at a midwife appointment a couple of days ago and it was fine, urine test showed my sugar was a bit high but we put that down to the fact that I'd just polished off a bowl of pasta and tomato sauce. Can anyone think what might be causing this? I just don't want it to happen again when I'm somewhere I can't get into a position to recover.