Lastnight I had unprotected sex (stupid I know.) and it turns out I was on my 33% chance for pregnancy day. I went and got the generic version of plan b today and took it right away. However, after doing some research I had read that it can't prevent ovulation if it's already happenend, AND it is not effective for women over 176 and I am 200 pounds. There is no way I can get pregnant right now and I am freaking out!! Any advice or similar situations?