19 Dpo BFN and No AF. Whats going on???!!!?

Not sure why this question was deleted so I answered your first one but I had this and I had a chemical pregnancy. So the egg got fertilized (reason for pregnancy symptoms) but no implantation so no bleeding/spotting and then as the body realized it HCG levels fell (reason for BFN) and then my period came OVER 3 weeks late. OR you may be testing too early still... so try again in a week.. but this is just what happened to me.