I was sitting on the sofa, DP was leaving for work. I stood up on the sofa to give DP a kiss and cuddle, think he lifted me off the sofa in the hug then must have lowered me down to the floor (he's a foot taller). I remember him saying "keep your face off my work jacket or your face will get dirty" then the next thing I know I'm sitting on the floor with my head sort of at his knees with a throbbing headache and a feeling of total confusion as to what was happening then started to cry 
DP says I just slid to the floor in very slow motion, not like a quick collapse.
I feel completely fine now, just a bit of a headache. I had eaten lunch so it's not lack of food. Was it just extreme headrush maybe? I do get that sometimes when I stand up too quickly.