I was making out with my boyfriend and after that I gave him a blowjob he ejaculated then some of it got on his hand or finger. he wiped it with a tissue after 5 or 10 mins then he fingered me. I think it was a dry semen but i'm not sure but its been over 5 mins and he wiped his hand with tissue but he didn't wash his hand. I'm just worried that I might get pregnant from it. I was currently on my period I think its first day but I'm still worried that I might get pregnant. any thoughts about this?