I took a risk by bringing this up. I did NOT want to upset you. Please, please know that.
I did however, not want to see this, if it is pcos, not addressed by you...I meant it, knowledge is power, it allows you to understand and work with your body.
Here is the site I'd recommend: http://www.pcosupport.org/
As I said, I was at one time diagnosed with this, joined a support group, went to a regional convention, learned a lot, along with by the time I got a second opinion, that I didn't have this. I do deal with one health issue in common, which is insulin resistance and hyperinsulinemia, high bp, high cholesterol (it's called syndrome x).
I can tell you the degree of severity of this varies. I worked with a nurse who had pcos and last I knew, she had had her 3rd son
I met many women with children during my time of researching this, belonging to a list for women trying to conceive.
Key is understanding how pcos may affect fertility, and what you can do to deal with this. One is a dietary approach, second option are meds (not sure what is current, one is an oral diabetic pill that can help enhance fertility in women with pcos). Also key is finding a good specialist that has great skill in listening and working with their clients. Never forget, you hire them, they are not gods!
Knowing this at 21 is far better than finding it out 6 or 7 years from now, or trying to conceive w/out knowing.
There are GREAT support lists out there, and I do highly recommend the list/group I listed above.