Chemical???

Maggie

Hey all need some help bc I am pretty confused. I am suppose to start my period today or tomorrow. So I took a pregnancy test first on a cheapie. And it came back faint so I switched to a different brand cheapie and a faint line again. Then I went to the bathroom and started my “period”. Still confused so I took a FRER and it came back like this. How do I know what implantation bleeding is (didn’t get this on pregnancy 1) vs a chemical?