If you can't figure if he had it off when he was inside you, no one else will be able to here. You will have to take a test for conclusive results.
Yeah I get that, but can you get a mucousy discharge from anal sex even with a condom? I dont have any reason to believe he took it off except for the cum like substance when I went to the bathroom. I had felt it was on with my hand multiple times during sex and wasnt worried at all until later when I went to the bathroom.