Help me please!

Okay so according to glow and my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> I have 3 days left until I'm suppose to start. We'll I'm never ever early but I'm bleeding a light pink. Is that considered spotting when the implantation is happening or is my period coming on early?!?!?