pregnant or post Depo-provera issues???

Mari • Christian ✝️🕉 Mama to be 06.20.19 💙 HondurAmerican 🇭🇳 Military Wife ✈️
My cycles were always 27 days (periods 4 days long) until a Depo shot. That shot ruined me.....I went through hell after. 
My OB/GYN put me on a pill to regulate my cycle. After 1 pack, my body was starting/stopping periods on its own from Dec 2016 - June 2017.
I'm (for my usual) 10 days late. I had super light cramping on & off all day, & just wiped pink spotting.
Could my period be starting like this even though it never has? Or was that implantation cramps & bleeding??