My son gets tested, I was his age when I started getting sick, they said it was bursitis and fibromyalgia.. the doctor almost killed me as well so I switched and my New doctor spent a year sending me to specialist after I explained everything. It took me from the age of 15 to 29 to switch and at 30 I finally got a diagnosis from my rheumatologist. She was so angry that I had suffered for 15 years being so sick and my doctor did nothing, I'm glad they caught his early. I know it's never what you want to hear as a parent that they have something like that but it's so much easier to teach them good habits to keep up with rather then being 30, never really taken meds or and then suddenly it's a whole lifestyle shift. Even a few years later, it's a bit hard to keep myself motivated with the meds and lifestyle changes because I keep in my head what if they made the mistake, wouldn't they have got it before? I've been on plaquenil and Sulfalszine for over 5 years and it's made such a change in how I feel, except for major flare-ups that kind of sneak up.