Pregnant by toilet seat?

So around 1 to 3 weeks ago i went to the restroom in the middle of the night and when i went to wipe i felt very wet. It was the middle of the night and was half asleep so i may have accidently swiped the paper on the toilet seat/rim of the toilet before wiping. I have 2 roommates so if the masturbated and left some semen on the toilet seat what are the chances of me being pregnant? Im 3 days late on my period so im not sure if I'm just being paranoid or not.

Please dont laugh at me :/