ok help

so im 13 days late and i tried to take a preg test this morning. so i pee on the dang stick and take a shower. after ive dried off and get dressed i look at the test.. sigh.... NOTHING HAPPENED... no lines show up nothing. i made sure i peed on the dang thing and nothing. i had my husband look at it to make sure my dumb ass didnt mess up somehow but i did it right. no lines nothing. the heck? is this normal? holy crap batman. HELP. frustrated