I had unprotected sex with my bf on November 13 2015. I took an emergency contraception a few hours later. I took the pill called Take Action ,now i am overweight and read that it wouldnt work.A week later I started feeling very fatigue ,nauseated, my sense of smell increased, and I had strong back pains that woke me out my sleep. They all lasted a week and aa couple days. My breast do feel heavier and my nipples hurt . My period came on November 27 and ended November 30.I was crampy the first day then I was fine besides my mood swings which is normal for me. ,we had sex a day before my period started. My cycle the month before started October 25 and ended October 29.I think I was ovulating the day we had sex . He did ejuculate in me twice, some did come out . Should I take a pregnancy test?