Implantation bleeding or early period?

Erika

I use 3 different apps and they all say I should start my cycle in 4-8 days, however I started with very light spotting earlier today that has since gotten a bit heavier. It's light pink/brownish, I did have a vvvvfl test this morning and was planning on getting the blood test done in a few days if I missed my period, but now I'm kind of confused. Can anyone else relate?