it depends if this happens all the time to you. If your cycle is normal or not. Wait until the next period of nothing take a test,,, if you arent try to be more responsible about taking them... if you arent trying to take them. If you are and trying not to get pregnant then do not even bother to out a chemical in your body you know you wont want to take. Also if you dont like the pills, try the patch, the ring, IUD, the nerplant, any of them they all work the same... but not all like a condom. Up to you and your schedule jus givin as much advice as needed
i think Waiting till your next cycle date of 17-18th feb should be considered. if no periods then do a urine test.