Implantation Bleeding or Af?

Was hoping someone is in the same boat as me.. I am ten days past ovulation(ttc), 4-5 days until Af is due and I had some light blood last night and today its been similar to af, bright red in color with cramps. Recent hpt test are bfn. Still having very sore and tender breasts for about 7 days, smell sensitivity and moody. Anyone else experience this and still got a bfp?