birth control
"I have been on various types of oral contraceptives for years and just 1 month ago switched to Loestrin 24.  I have had no noticeable side effects differing from other BC pills.  HOWEVER, I did not have a period this month!!!  After being SIX days late and worrying that I was pregnant, and all that comes along with such a huge life-change, I took a pregnancy test. Negative. I CAN NOT worry every month whether I am pregnant because I may or may not have a period with Loestrin 24 Fe."