Why is implantation so confusing to me? Help!

Khloe

Okay so I have very irregular periods but it’s usually 6 weeks give or take, 3 days ago I started spotting which would be around the time of my period (again, give or take). I thought it was the beginning of my period but here I am on day 3 and it’s completely stopped. I never needed a tampon or pad. Just brownish pink spotting when I wiped. I’ve never had that happen. Could this be implantation? How soon would I get a positive ? Everyone online is so confusing! Haha help!