I got home just after 10pm last night following an annoying evening. I had a shower then went to check my emails.
As I sat in front of my PC I started to very suddenly feel really dizzy. It was like someone was pouring the dizziness into my head. Then I was hit with the compulsion to lie down so I slumped onto my keyboard then slid off my chair onto the floor, where I lay barely able to move with a pins and needles-esque tingling across my whole body. After lying on the floor for what felt like 15 or 20 mins, I was fine!

I'm here till 2pm today so if we could diagnose and cure me before then, that would be great! :)