Hi Julie, welcome! You've come to the right place for support and encouragement! If you're interested, there is a sub-forum for 20-somethings under "Support Groups" and a sub-forum for those with PCOS under "Dieting with Obstacles" on this page:
http://www.3fatchicks.com/forum/forumdisplay.php?f=1. Congrats on the 20-lbs loss, and good luck with your future efforts!