This thread is working really... several quiet folks have come to talk about being young on this board. So, get some threads going about your issues ...if us "old as dirt" folks can help, we will. But most importantly you can learn from each other about what works for your problems.
Srinn -- try going to Goodwill or a consignment shop or your local equivalent of those. Try on a pile of clothes and you'll start to see which sizes work for you. Different companies make the same "size" different... frustrating, but you'll get the hang of it !