Was it his cum or mine?

Earlier today I had sex. We haven't had sex in like, 2 months. Well, he wore a condom the first 2 times, but the other 5 he didn't. I didn't feel anything go inside of me, but we were going at it for so long and so many times that I couldn't feel myself. A little TMI, but the last time, he said he didn't cum in me, at least he didn't think, but when he got up to go to the bathroom I checked and it was very slimy and sort of creamy in a way but I didn't tell him. Do you think it was his cum or my own? I'm confused. 🙄😐🙁