I have the exact same problem. I get the shakiness too. I am in the process of getting a blood test now. The doctor suggested anxiety as a possibility. Anxiety can have similar diabetes symptoms including the dry mouth and thirstiness. I'm not sure if I have diabetes yet because I'm still to hear from the blood test. If you feel worse go back and tell the doctor. He will have to rethink what else to do. It's up to them to make you well again
just keep pushing ... feeling ill is horrible
I have heard of some diabetes being missed with blood tests / urine tests coming back clear. I still get intense dizziness and all the other symptoms. I hope you find out whats wrong soon