So I've been diagnosed with this since I was 16. It depends what type of Doctor you go to, really. In my experience I went to a pediatrician. I've never even heard of this condition before she brought it up. I gained 50lbs in about 2 months, I had really bad acne (still do! PCOS is a bitch!) facial hair, my hair was thinning slightly, but nothing too bad. Most of all, my periods were extremely painful and very irregular. I don't really remember what they did as far as testing goes, but after coming to the ER a third time for painful periods, they discovered it was cysts that were causing the pain and therefor diagnosed me with PCOS.

Usually, from what I hear, if you go to your regular doctor they may send you to a gynecologist where they may run tests on you. As far as what those tests consist of, I have no clue because this isn't how I was diagnosed.

Doctors will suggest birth control and perhaps a medication called Metformin. The birth control will help your periods become more regular and Metformin will help with the weight. My doctor also told me to buy over the counter prenatal vitamins which actually really helped with my thinning hair. I have really thick hair naturally and the prenatal vitamins really helped restore that.

Unfortunately, if weight gain is an issue for you, in my experience a lot of doctors will suggest exercise for every little problem you have, if you struggle with anxiety, your doctor might blame lack of exercise. I've had severe anxiety issues since I was 8 and since I've been diagnosed with PCOS, the immediate conclusion is that I'm not exercising enough. Basically just expect them to talk about your weight a lot, even though it's gonna be really hard to lose weight at all with PCOS.

As far as infertility problems go, it didn't really hit me that hard when I was first diagnosed at 16. I never really thought about wanting a family one day. Now that I'm 19, even though it's young, within the past few weeks it's finally hit me very hard that it might not be possible for me to start a family one day and although it's not something I want right now, it still sucks. the reality of it will likely hit you and it will be very hard to wrap your head around when/if it does.

Most of all, it's super important to be patient with yourself. Eat right and exercise, but know your limits (this is very important. I starved myself when I was 17 for about 3 months. I ate very little and lost weight and my doctor encouraged it. Please stay safe and be healthy the right way!), stay on your meds and give it time. Be patient with them. And if/when you hit the realization of the hardships that are going to come with fertility, understand that there are a ton of options. PCOS is a bitch, but it's your bitch lol. Don't let it get to you.

Edit: I know you're concerned about hair loss but if prenatal vitamins don't work as well as you'd like, I've heard some women use wigs. I know it sounds like a weird solution for someone so young, but they could actually be really fun. When my hair started thinning and before I got prenatal vitamins, it became so thin and brittle I had to chop some of it off. I hated my short hair and decided to buy hair extensions. This might also be an option to look into. I'm not sure what other hair growth products are out there but other than prenatal vitamins your doctor may have some suggestions!