Implantation bleeding?

My last period was in November 2018. When to a gynecologist on 02/07/19

He prescribe progesterone to start my period. Finshed the pills on 02/16/19.Have not had my period. I spotted some brown and the light pink on 02/20/19. No clots or any bleeding after. I'm going crazy. I have not gone to my follow up appointment

Could it be implantation bleeding???