Very stupid question

Judge away as I know this was wrong. I had sex on Monday with a friend of mine and he finished in me. The next day, my ex called me and wanted to hang out. One thing led to another and I slept with him as well. However with my ex, he didn’t finish in me but also didn’t use a condom. Later on that day when I went to the bathroom, it looked like cum was leaking out (it also smelled exactly like sperm). Could this have been leftover from the day before or could it have been from my ex unknowingly getting some up there?

*Before my ex and I had slept together, I wasn’t having any kind of discharge or anything