"i would go a year  with no period. when i did, it would last 3-6 weeks with debilitating cramps &amp; severe bleeding (bleed through a super  tampon in a few hours). previous 2 docs said this was normal for someone not on birth control. finally found a new doc &amp; he ordered blood work &amp; an ultrasound. come to find out, my estrogen levels were super low, testosterone was high, &amp; i had polycystic ovary syndrome (pcos). since starting this birth control; my period happens like clockwork, it only lasts 3-4 days, &amp; the pain has practically disappeared, only light cramps now &amp; then. no significant weight or mood changes-already had issues with both to begin with. definitely no change in sex drive."