Did my bf accidentally post my naked pic to facebook?

I was looking at my bfs Facebook and he got a warning notification and I was like what would he even have posted? So I clicked on it and it showed this

I'm super confused because I never saw he posted this to his story or timeline at all and it had a bunch of stickers in the middle. I know his phone wasn't on in his pocket because he keeps it locked.

Some back story is my dad is staying with us and I was being sneaky with my bf while he was in the bathroom so I called him on messenger video and was being funny and getting naked and bending over as a joke because I'm weird about having sex while my dad is in the house.

My bf is not tech smart so if he posted this it wouldve been an accident but o.m.g. how long might it have been online before it was reported or is it possible it never posted because of nudity? The weird thing is I did this for him 3 days ago and this says it was for yesterday. I'd ask him about it but he's sleeping right now. Did all his friends literally see me naked on his story? O.m.g.....