I know exactly how you feel. Have been having profust sweating in the early hours through till mid-morning and it drives me mad. I do have an underactive thyroid as well for which I take thyroxine so it could be like Anna says something to do with that. Was only diagnosed in August but feel sure I have had diabetes a lot longer than that. In fact, despite frequent trips to GP because I felt unwell, she never even suggested I could be diabetic or that I be tested. In the end I bought some urinalysis sticks and found my glucose levels were as high as they could be. WHen I went to GP and told her she tested me and said "Oh yes so you are we'd better send you for Hb1AC" which came back extremely high so am now on Metformin. Like you say the sweating and getting up in the night to go to the loo wears you down - lack of sleep etc., just hope it is not like this forever! I wish you well.