Leak?

Yesterday I woke up first thing in the morning and was standing in the kitchen before I went to the bathroom and felt a trickle down my leg so I went to the bathroom and wiped and it was wet. I haven’t had any other instances since and no pain that I’ve noticed. Could it have just been urine? Nurse at doctors office said to wear a pad and if it was getting wet to let them know but I wore a pad for a good chunk of the day and didn’t notice it being wet. Has this happened to anyone?