My periods were to start on 3rd of this month and i had protected sex on 4th of this month and my partner ejaculated outside as well.. My periods are usually 5-7 days late every month.. But they never came this month instead I started having brown discharge on 22nd.. I did h.p.t. every week after my periods were late.. They all were negative.. I did it yesterday as well and it was negative.. I am very much worried.. Kindly help me