discharge

So earlier today I was in a meeting and when I stood up afterwards my chair looked a little wet. I kind of waved it off like maybe it was sweat for sitting for almost 3 hours straight. I went home and went to bed and woke up at 3am to find my underwear soaked... When I went into the bathroom I realized it had to have been discharge because more spilled out into the toilet the moment I sat down. What's going on?