I suggest strong ginger tea, against nausea.
Taking the pill can have a tremendous impact on yr body. I had a bad experience and even if lots of people say that they tolerate it, I would not suggest it to anyone... I just believe that there is something extremely wrong in it and maybe for some people it just takes a longer time for it to show up.
Check for PCOS and for venereal diseases (such as Chlamydia or Mycoplasma) instead.