"i took yaz for about 4 years.  i loved it at first.  i did go up a cup size and got a little curvier, but overall, it was great.  the last year, however, i started to turn into a monster during my period.  i got severe migraines right at the start of my period and it would last about two days.  i am not sure why the medicine changed on me, but i recently switched to loestrin24 because i couldn&#039;t handle the mood swings and headaches any longer.  my doctor said there was no link in all of these recent changes...i had to disagree with her though because i already feel better after switching. "