Hi, there is close to no chance of getting pregnant if you were both fully clothed.
There's a theoretical chance that one could get pregnant in this fashion given a very specific set of (unlikely) circumstances, but I've yet to come across any documented cases of someone getting pregnant in this manner.
Whatever the case this time, it seems that you are both spooked, so it's a good time to have a chat about using reliable contraception with your parter and doctor sooner rather than later.