I pee frequently at night but I'm fine in the day?!

I'm 14 and a virgin so its not because of pregnancy. When I go to bed at around 9:30pm - 10pm I end up going to sleep at around 11 or later because I always have the urge to pee. Most of the time its a really small amount but I always feel like my bladder is half-full and I won't be able to sleep if I don't go pee. I don't have a bladder infection because I got tested a few months ago and my pee was fine.

During the day I don't pee often but at night I do. I usually have my dinner at around 7 or 8pm if that helps with a drink. (Though one day I skipped dinner and the last time I had a drink was at 3pm and I still had the pee problem at night!!) Why is this happening and how can I stop this because it stops me from getting good sleep! Thanks.