What is wrong with me?

I recently had four vials of blood taken from my arm for a CBC and other labs. I got the results back from the hospital when I was there (I'm doing clinical rotations to satisfy my CNA license requirements) because the doctor's office never calls you unless you're near-death. I had the bloodwork done because I had an "episode" in cl which resulted in my instructor (an R.N.) taking my blood sugar which was 60 and my BP at 106/64, both relatively low. I went to the doctor, obviously, where they said I had a viral infection (I had just finished a round of antibiotics for a sinus infection) and said to come back for bloodwork. They wanted to check orthostatics and such. I had expected my blood sugar to come back showing me as hyperglycemic, but it's really actually only 77(fasting). Now, finally, to my question. Why am I urinating so frequently (getting up twice in the night) and why do I have such a sudden urge to go, if I'm not diabetic? I think a doctor should answer this if one.