It seems as though we need population control. By 2050 the earth has been estimated to be populated by 9,309,051,539 human beings according to the Cencus Bureau. That's over 3 billion more humans than this year. But no, birth control is not a form of active population control. If this were the case the government would not leave the pill to be optional, or would restrict families to only having a certain number of children (as they do in China) It is so that you can be sexually active without producing spawn, which is especially helpful if you're younger.
Birth control can however be dangerous to your health. There have been some serious side effects emerging, especially from Yaz, that encompass heart attacks and strokes (which eventually lead to death.) Those risks are more severe if you are over the age of 30 while taking the pill and/or a smoker.