I can't get a positive reading!

Olivia

I started ovulating on the first and my husband and I did the deed the day before and a few times after. I immediately started cramping hard and my left ovarie felt like implantation pain. that Thursday - Friday I started spotting and my boobs have been huge and hurting ever since. I've been nauseous and so tired I fell asleep in my parked car. I start my period this Sunday the 20th. has anyone known their pregnant without a positive reading yet?