You would do better to test in the morning before you drink anything. Not at night. What you drink during the day dilutes the urine and if the HCG in your body isn't high enough might produce a false negative.
When I got pregnant, I kept getting menstrual cramps right around the time I was supposed to start my period and after it was late. It felt like I would start literally any minute and like you, I kept feeling wet and running to the bathroom to check. So it's definitely an indication but not a sure thing. You should take a pregnancy test first thing in the morning like clysta said. Good luck!!