Pregency related. Negative. please help!

Hello I have my periods on 25 or 26 th of July and had a sex 29th of july night and we had a unprotected sex in a standing position during my last days of periods  and he ejaculated inside me and 30 th night I have taken I pill on 3rd aug I got some brown discharge not a Bloor blood spot but brown discharge with mucus and few days back I've noticed I have got white mucus kind of discharge do it means no pregnancy. And 25 is my period date and today is 28 th of aug. And I'm facing following symptoms like breast pain which is usually my periods symptoms and few day back I'm also facing this system of smell issue like I can't bear the smell of perfume or any smell is feeling like excessive. I've did pregnancy test 23of aug but that is negative. Please help