It looked like cum but it didn’t feel like it

So my man and I had raw sex today for the first time.

We’ve both been cleared of STIs, so I didn’t think it’d be an issue, but this is the second time after sex that I’ve noticed a thick white creamy discharge that wasn’t my cum or his. I discharged this before when I did finish but it happened again today after we finished having sex. I didn’t finish, though I was feeling something.

It didn’t have an odor, it wasn’t cum, and we didn’t use lube today either (whereas last time we did use lube so we thought it was that)

Has anyone else experienced this?What could it be?