I went to the dentist about 4 weeks ago with my 8yr old daughter she had a really bad time as I held her hand and seen the blood I went all funny I felt sick then extremely hot then dizzy I looked away gained my composure and when I looked back it got worse I felt extremely cold just on my face dizzy and as if I was going to faint and felt sick my head also hurt the dentist noticed and said I lost all the colour in my face gave me a glass of water and led me to sit down I have been through a number of experiences like this before and ive been fine now it happens often over simple things today I was walking from the shop to the nursery and it just came on me i felt dizzy hot and sick I sat down gained my composure and carried on the only thing i could think about at the nursery was please hurry so i can go and sit down my face went really cold I felt dizzy and sick for about an hour and half after it started does anyone have any idea as to why this is happening?