Has this been something new for you or has it been going on for some time? I know a person who has been this way their whole life, but they do also go often during the day. When someone was complaining about having to get up to pee 1-2 times per night, she nearly laughed since she gets up many more times than thoat and wished it could only be 1-2 times! There was some kind of condition going on that medication can somewhat help, but not a complete cure. But, if yours is ONLY at night and if it hasn't been this way for a long time, perhaps it's something different.
Just some background questions that may help- about how much water do you drink during the day? Do you drink a pretty even amount throughout the day or more at certain times than others? What other beverages? What does a typical dinner look like for you?