First Off...I Have An Appointment To Go See My Gyno,

First off...I have an appointment to go see my gyno, but just curious as it's been driving me nuts waiting for this appointment.
For the past month and a half I have unusual amount of vaginal discharge (cloudy, white, watery). I have no itching or pain. I have no sores. I have slight burning in one or two spots if discharge isn't wiped away often enough. There is no tenderness or pain when I touch or look at it. My vagina is inflamed.
I do have hyperthyroid. I had my first round of radiation 1 1/2 years ago and have not been on any medication for it since.
Please help tell me what's going on. I have read so many things on STD's, to yeast and bacterial growths. My mind is all over the place.
I should tell you I have been in the same relationship for 15 years, however no sexual anything has happened for about 9 months now. My partner does not show any signs of anything.