what was it? has anyone else has this?

Hi everyone. 
So my partner and I had sex last night. I'm not on contraception and we are not trying but we are just going with it.
We had sex then we both finished off with oral sex. 
But this morning I woke up and had allot of discharge come out in me (like what happens when he cums in me) could this be pre cum or sonthing to do with me?
It was clear/whitish