Last night my boyfriend and I were hanging out and things began to escalate... I started sucking his dick and I started to rub my fingers on his tip and he cummed on them. I licked the cum off and my fingers ended up drying. about and hour later I went home and I washed my hands (with soap and water), but I didn't clean under my nails. then I fingered myself. is there anyway I could become pregnant from this?