It started as a sore throat on Saturday morning then turned into a bad cold. I felt terrible through Sunday and Monday and this morning when I woke up, I stood to go to the toilet and completely fell. I couldn't hold my own body weight and had to lie back down. After around half an hour I could walk but all day I have been dizzy and losing my balance, walking into things etc. I've also experienced some chest pain today, kind of like heart burn but not heart burn.