Question bout an oops

So may have a slight problem. So my fiance and I had our baby 4 weeks ago and we decided to fool around without actual insertion...problem is he accidentally slipped in (it was a quick in and out nothing more)...this was of course after he had gotten off before hand, yes we ended up wiping things down when that happened with baby wipes (it was the closest thing available) before the accidental insertion. I also know wiping things down doesn't stop one from getting pregnant...not sure if wipes would help since it is antibacterial or whatever. I also known after someone has a baby they are prone to getting pregnant sooner which right now wouldn't be a good idea since I had a c-section. Don't need something trying to grow inside just yet...Guess my question is what do you think my chances are and do you think I should grab the plan B pill?