Sex & Plan B

Bella

On May 3rd my bf and I had sex, the condom broke and unfortunately he came inside of me. I’m 15. We went and bought plan B right after... I took it 2-3 hours after the incident. I started have heavy spotting a week later and it stuck around for about 4 days. It’s now May 29th and I’m a week late for my period. I know that plan B can really mess up your cycle but I’m not sure what to think. I really need a women’s advice and reassurance. Am I pregnant? Could I be? Am I overreacting? (I don’t have a mother, that’s why I’ve resorted to this.) please help.