I wouldn't wish to give sound advice on something like this as I feel you should consult the GP. However my experience and knowledge is that last time I did a fasting blood test I fainted as my sugars dropped too low. I spoke to the nurse and informed her I was diabetic and she informed me that the doctor had made a mistake. The reasons doctor's ask for a fasting blood test is because they say they get more accurate results with regards to red blood cell count etc. however in the case of diabetics it should not be done. Somebody I know has low blood sugar from time to time and I advised her that she should always carry glucose tablets with her as she can suddenly go really low and it is dangerous. She isn't diabetic however. Once she collapsed outside a nightclub and the bouncers asked me to take her away as they wrongly assumed she was too drunk. I informed them she had a glucose intolerance and they were to leave her alone. They wouldn't listen so, due to their nonchalance, I lied to them as it was difficult for me to explain to them about the condition and said she was diabetic and I needed to wake her up to give her sugar straight away otherwise an ambulance would have to be called. Sure enough when she awoke, she was very pale and her blood glucose was low and I had some glucose on me so told her she needed it. I can't remember what condition it is called but it was similar to diabetes in the fact that hypoglyceamia can take place, however unfortunately it cannot be controlled very well sometimes. I suggest starchy meals in the mornings for her and that she always takes glucose energy tablets or lucozade with her until you are able to find the correct diagnosis.