My doctor said I have low blood pressure about100/? I have taken a diabetes test-blood test and nothing showed up but I have all the low blood pressure symptoms dizziness, almost passing out disorientation and blurriness but nothing can account for the extreme hunger and thirst and frequent urination (only at nightime) I get real shaky and irritable when the extreme hunger hits Can your sugar be fine sometimes and not other times When they took the test my levels were normal any suggestions