Hello there I've been having unprotected sex with my boyfriend. I am 19 and he is 22.He's been using the pull out method... I know there's still a risk. Sometimes I have sharp pains after we have sex.... lets say about 30 to in hour after sex or so...... The pain is sharp, comes out of no were like a knife and its so unbearable I have to lay down for a while to let it subside... and i haven't received my period this month its been a week... could I be pregnant ???