Don’t know... need help/advice!!!

So my last period was August 18-22... now my periods are always the same. Me and my significant other have been having sex from my period to today everyday. We are trying to conceive... so I was supposed to start my period the 13th of September well it is now the 19th and that means I am 6 days late... so Sunday the 16th I took 3 of the dollar tree brand pregnancy test.. all 3 were a definite negative 😞 but here I am 2 days later and I am experiencing light cramping, sore breasts, and a light pink discharge... I’m not feeling nauseous at all... been getting back pain and craving for iced coffee which normally I’m not a fan of. Still no af... so not sure what to do?? Could use some advice!