I'm right there with you, my dear. It took me 16 years for a diagnosis!
Best thing you can do is to take care of yourself...make best friends with your rheumatologist, eat right, take lots of vitamins, rest when you can...and educate yourself. This board is a wealth of knowledge...you can find all sorts of tips and tricks on here and see what works for you.
The initial diagnosis is a hard time...expect to struggle physically and mentally with what is going on with you. It's a hard thing to stomach...but in time (it's taken me 3 months), you will learn what makes your body happy, and how to deal with flares. You'll still have your bad days...we all do...but you'll learn how to cope. That's so important to do.
Lastly but certainly not least, make sure you have a good support system. Family, friends, or anyone you can hold near and dear...educate them as well, so that they know what you are going through. Sometimes just having a shoulder to cry on can make all the difference. Know that we are always here with a knowing ear anytime you need us!
Welcome to the board...can't wait to get to know you better!!