Thanks for the question- I really am glad that you guys are asking mature questions about sex and birth control: sex education is so important and we just don’t have enough of it.
Since birth control pills affect hormone cycles in your body in order to control ovulation, there can be side effects, and some women find that they can’t take them at all. In general, the side effects will be few, since all medicines have to go though strict testing to make sure they are safe and effective. Birth control pills are safe to take, but you should always discuss their use with a doctor before taking them (like with any medication), and remember to report any side effects to your doctor, so they can review your prescription.
Most important to remember is that while the pill controls ovulation and can stop you getting pregnant, it will not stop you from getting STDs- so always use a condom.