My Last Period Was On April 18 To The 22nd.

My Last Period was on April 18 to the 22nd. I was ovulating on the 29th. I also had unprotected sex on that day as well . Two days later I notice bright pink spotting when I go to use the restroom. It last for two days . Yesterday I notice brownish discharge as well . But the brownish dish charge was like a yolk type discharge also there was light pink discharge and clear discharge that yolk way as well . What’s going on ? My stomach did feel weird during those two days of spotting & my period not til 11 days from now , google is giving me all kind of crazy answers . Can a female know she’s pregnant before her mis period ?