Good advice here, especially about going to a specialist to get properly diagnosed first. You do have options, but only a doc who is strong in the area of auto-immune disorders and/or sports medicine will know the current findings. (I have a great doc, and am happy to share him.)
Although there is no cure now, so many young people are getting it that the field is growing rapidly and therapy options are growing. Don't go to a doc that tells you to grin and bear it; go to one who will support you in finding the best treatment for you and your lifestyle.
Only 50% of people who take glucosamine are responders, so this therapy may not work for you. I'd be happy to chat about this more if you want--feel free to add me to the list of folks to contact. The more experiences you hear about, the more you will learn about your options.