To make a long story short, had sex a couple of times the day my period ended, no protection and I forgot my birth control. I started spotting yesterday, brown patch and spots in my underwear. Now, today it’s more spots and actually blood, some pink and some red spots. Blood isn’t heavy and I’m only cramping slightly, so I don’t think it’s my period...Because my period ended 9 days ago. Could this be implantation bleeding??