Sorry, TMI but...wet pants?

I’m not really sure where to ask this, but I figured this was the best place.

This is going to be a bit TMI, but this morning I woke up with my underwear and the leggings I slept in being soaked in the crotch area. It was almost like I peed my pants but I didn’t—didn’t smell like urine, just a faint smell like discharge. It also wasn’t creamy, clumpy, etc. the texture was literally as if I had poured water over my clothing. I had sex the night before, but my husband pulled out and it didn’t seem the same as when he finishes inside. My husband suggested a sexual dream, but I don’t remember having a dream and I’ve never had this happen with sexual dreams previously (even when I was pregnant and more prone to that kind of thing). Has anyone had this happen? What was it?

I should add that I don’t believe I’m pregnant (I have a copper IUD).