Ok so me and my bf were messing around and he pre-came a little bit in his underwear. I put my hand in his pants and accidentally touched the outside of this underwear where the pre-cm had soaked through the silky underwear. I took my hand back and wiped the finger that touched it on his jeans. I didn't wipe thoroughly but I didn't have much on my finger to begin with. About 1-2 minutes later I fingered my self with the same finger before realizing what I had done. I am on birth control but I was taking antibiotics at the time so the birth control was not very effective if effective at all.
Is there a risk for pregnancy here?