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??

Implantation bleed or miscarriage or neither?

Implantation Bleeding vs. Period: How to Tell the Difference - FamilyEducation

Why Is My Period Blood Brown? Period Blood Color, Explained

Ovulation bleeding vs. Implantation bleeding: How long does it last? - Inito

This is a miscarrige isn't it? *Warning Picture Included*

6dp5dt - on lovenox - bfp yesterday and now lots brown blood - HELP!!! (WARNING PHOTO INCLUDED)

Brown vaginal discharge- all you need to know!

Brown vaginal discharge- all you need to know!

Brown discharge after period: What does it mean, and is it normal?

What might cause a brown discharge during the menstrual cycle (before/during/after menstruation)? - Quora

Implantation bleeding or just old blood? Last week it started as brown discharge an then this didn't get any heavier since then - Glow Community

IMPLANTATION BLEEDING can be treated - FindaTopDoc

Implantation Bleeding

Ovulation bleeding vs. Implantation bleeding: How long does it last? - Inito