Ok so I had unprotected sex and took a plan b almost immediately. After I took the pill I read that it may not work for women over 200 lbs. So a few days later my doc prescribed me birth control pills. I was told to take 4 one day then 4 the next day. So of course.. I did. Well few days later I started to bleed which lasted approximately 4 days... So now its a few weeks later and I feel like I'm going to have another period which would be considered the twice one this month.. Has this ever happened to anyone?