I started a new birthcontrol pill, now two weeks into the 3rd pack. My periods have been heavier than normal, and last 6+ days. I had unprotected sex about 4 weeks ago(changed my mind and used a condom half way into sex). My last period was not late and was again heavier than normal, but i did spot for about 3 days after my 6 day heavy bleeding. Now 9 days after my period i have heavy breakthrough bleeding and cramps. I did forget a pill and took a couple out of order this past week. Could this be implantation bleeding or just my body getting used to the hormones in my bc pills?