Plan b side effects

I know plan b has side effects but how long do they last ? A few days? A month? I been nauseous and bloating for a few weeks and its been like a month that i took plan b. We had a condom break and it was during my fertile days. Took plan b 7 hours after. After that my period started a week early but it only lasted 2 days. I took a pregnancy test just in case after a week from that bleeding and it was negative so im not pregnant. But i hate this bloating, nausea and feeling like my period is coming cramps. Have you had side effects last this long?