I was walking through a park to get to the shops this lunchtime and I suddenly felt very much like I was going to be sick. It was like a wave of nausea just swept over me in seconds and I ended up dashing to the side of the path to be sick into a bush. It was lovely. Few people staring at me, so my pride has taken a bit of a dent as well 
Funnily enough, now I've been sick I feel a bit wiped but generally fine otherwise. What on earth is that about?!