Plan B pill

Kathy

So I had sex on Jan 3 the condom broke and took a morning after pill on Jan 4. Me and my husband are not ready to have another baby since we have 2 already and I'm a college student. Well on Jan 15. I started feeling wierd so I bought a pregnancy test and decided to take it on Jan 17 since I was supposed to get my period that day. Yes Iknow plan b messes up your period but I felt wierd . To my surprise when I took the test I got a huge positive. I was surprised because a lot of people say Olán b works unless you weight is over 155 but I only weight 137. But to my luck I am pregnant with baby number 3 and I am happy with my surprise blessing. I just don't really know why the plan b did not work currently 5 weeks 5days