On the last day of my period (which typically lasts five days), I got a drop of ejaculate on my fingers when my boyfriend ejaculated after I touched him. I wiped it off a little, and around 5 minutes later, I wiped myself after I went to the bathroom and my finger touched directly on my privates. Now I am worried I could get pregnant. Does this pose a large pregnancy risk? My cycle is usually 26 days.