Could this be implantation bleeding

I missed my period for 2 months. I thought I may have gotten it last Thursday afternoon. I was having very little cramping and sore breast but no other symptoms. It never got heavy and stayed a light pink color but now it's a darker brown color. It only appears now when I wipe. When I get my period the first day is light but then the next day gets very heavy and I also crave chocolate and get acne on my face and get very moody. None of this happened this time. This has been going on for approximately 4 days now. I've read articles online that implantation bleeding varies from woman to woman as far as duration. Sorry for the gross photo but I really could use some advice.