Please help. I think I may have been anally raped?

So your butt doesn't hurt at all and you aren't bleeding? I think it's unlikely you were raped. You probably just stumbled and fell over.

You think it would hurt me or I would be bleeding?

I was at the club the other night and for some reason I left by myself, leaving all my friends (something I don't usually do) After that is a complete blackout (I'm sure my drink was spiked) until I came round about half an hour later walking the street topless (This could have been because it was raining heavy and I was wearing a tight stretch top and I took it off before it was making me so much colder gripped to my skin) miles away in a place I have never seen before (I was so confused I couldn't even find my bearings). I managed to get home from the club 3 hours later even though the club was 4 minutes away from my apartment. My anus is not sore at all absolutely zero pain or bleeding but I do have a a few marks and scratches on my body (These can be put down to falling) Is it possible I was anally raped and not know it? like at all? Even if lube was used? I am a male who has never engaged in anal please help I'm going crazy or am I paranoid