Okay so me and my boyfriend had sex the 14th of March and the condom broke and although he pulled out we were still worried we might not be safe. On the 15th I got my period but still wasn't satisfied so I took plan B the night of the 15th. My period was fairly normal, however it is over and I have had very light spotting the day right after my period and I've been Very fatigued and my breasts are tender and I'm worried it is still possible I could be pregnant. Should I be worried? Or is it likely I am not pregnant?