My boyfriend and I had sex and his condom broke during ejaculation, we immediately rushed to the store (condoms are our only form of birth control for another month) and I took plan B within an hour and a half of the mishap. I was due to start my period a week later, but never did. I believed I started 4 days late because I began to bleed heavily,so I figured mine had started since I had read that it causes heavy periods. But it only lasted 3 days and no there is little to no spotting. Was that my period? Did my plan b work? Am I pregnant?? Please help!!