Am I pregnant?

Ladies I need your help. I’m 5 days late took clear blue day of missed period (Friday) it was negative. Is it possible it was wrong? Also after my and DH BD on Sunday I wiped and had light pink discharge that had stopped that day. Today I used a tampon to see if AF was coming and there was a little blood. Could it be implantation or AF? I don’t know what to think and have a few days before I test again. Opinions needed thanks!!