Hi I'm not quite sure this is in the right place as I'm not diagnosed as of yet but I am having a blood test to check. My doctor didn't really give much information to be honest so just wanted to ask from people that know. How long do I need to fast for? My doctor sent me a form to book it myself and he said normally you fast from 8pm but if my appointment is not until 4pm is that the right amount of hours I need to fast? And what were your symptoms before diagnosis. The symptoms I'm having at the moment are constant shaky hands, feel sick most of the time dizzy when standing and are times where I feel like I'm going to pass out and have to sit wherever I am until it passes. Once it passes I then crave sugar and can easily get through packets of sweets until I feel better again other than the shaky hands. I do go very pale and sometimes feel like I need to be sick during the time of me feeling completely spaced out. If it was diabetes wouldn't thins happen all the time? I'm not overweight and only my nan and uncle have diabetes in my family as I know of. Thankyou.