I have frequent urination at night. Drink too much?

Possible, but also.. Other causes include large prostate if you are a male above 50 and leg swelling. The water redistributes when you lie flat at night and exits through urination. Other causes include diuretics e.g. Water pills, caffeine, or beer at night.
Possibly. Many causes of nocturnal urination, one of which is aggressive drinking. Video on nocturia: http://www.Youtube.Com/watch?V=msmebtz_cci.