my bf and i had sex in September. actually he didn't came inside me. he cummed on the bedsheet...after 15 minutes he washed his hands with a hand wash..probably after 15 minutes.. he put his finger inside me. i'm not sure that sperm was there on his hand. after this incident, in the following two months i got my periods on expected date. both of it was a normal period. but in November my period is delayed almost for 5 days. I'm nervous that i might be pregnant. we didn't had sex in the previous two months( months in which period came)