@katiecat08: When I got on birth control, it was as easy as going to my normal doctor and getting a prescription. It does not necessarily have to be more involved than that (your doctor may want to do a pelvic exam or blood work and will ask about family history, whether you smoke, etc). It’s up to you to decide what is most important for you in birth control; back then, for me, it was most important that it stop my periods, now it’s important that I not have to take a pill every day so I’m on the ring.
You have several options. I assume you mean hormonal birth control, but there are condoms, female condoms, and spongrs/diaphragms (spelling?). Obviously there is the pill, which you take every day. There are many different brands and hormone concentrations, and what works for one woman may not work for another.
There is the NuvaRing, which only comes in one brand. It goes in the vagina, you can leave it in during sex, and you only deal with it twice a month- when you put it in our take it out.
The patch is similar, but you stick it on you in a certain place, and I can’t remember if you change it weekly or monthly. I’ve heard stories of it wanting to peel off or wanting to stick really hard, but I really don’t know.
There’s an IUD, which can be hormonal or non-hormonal (copper). They usually last several years but have a large up-front cost. They can be removed at any time by your doctor.
There’s the shot, which you get every three months. The biggest disadvantage is if you don’t like it, you have to just deal with it. Of all methods, I seem to hear the most negative things about this one. There’s also the implant, which is a matchstick-sized implant they put in your arm. My friend has it and loves it because it lasts three years but they made her try the shot first.
Really, the best advice I can give is figure out what’s important to you. Do you want to skip your period or keep it? Can you remember to take a pill every day, or would you prefer something more long-lasting? Are you okay with needles, or inserting/having something inserted into your vagina, or do you want something less invasive? Planned Parenthood’s website has a neat little quiz you can take and they give you their reccommendations on the birth control they think will work for you. Of course it may be a trial-and-error process because no one knows how your body will react to hormonal birth control until you try it.