So it sounds like you were checked for a uti and for diabetes, and both came back negative? I am not sure what might be causing your problem then.
When I was a kid, I could pee like once or twice a day. When I was your age, I started peeing more. Now, I pee like every other hour.

Maybe we're just getting old, or maybe all of that not peeing enough caught up to me.

Soda never used to make me pee much at all. Now if I have one with dinner, I pee all night like a little old lady. Soon it'll be "no liquids after 6pm" for me.