Old blood or implantation bleeding??

TMI pictures are below. I’m suppose to get AF on 4/22/18 and had brown spotting on a panty liner. What do you guys think??

images./images/what-is-implantat

Breakthrough Bleeding: How To Stop It With Birth Control

Implantation bleeding and BFP!!! (TMI pic included)

Black Period Blood Color: What Does It Mean and How Can Be Treated? – Bellabeat

Implantation Bleeding: Am I Pregnant or Just Spotting?

Implantation bleeding or my period just being weird?

Brownish Vaginal Discharge On Birth Control Pills - Is It Normal or Not?

Is it implantation bleeding or my period?

Implantation bleeding vs. period bleeding: The differences - Flo

Warning: Graphic Photo!!! Is this implantation bleeding or my period starting? : r/Periods