birth control
"I am so glad I found this site and saw other people's experiences.  This drug works to prevent pregnancy, but I have a week with a light period, then a week of a normal period.  I have also been experiencing extreme mood swings.  I thought it was just me and the stress factor of having 3 young children to keep up with and that I am homeschooling the older ones.  Something just kept telling me that it was the birth control doing it.  I will be calling my dr. in the morning and switching!!"