Suggest Remedy For Severe Joint Pain

I am a 14 year old girl and I am very athletic. I am having mild to severe joint pain from time to time. But I still have full range of motion. I actually have hyper mobility too. Other symptoms I have are mild back and shoulder pain on the right side, I sometimes get lightheaded when I stand up, sometimes when I stand up my vision goes black but comes back a second later, sometimes for no apparent reason my lungs feel tight and I have shortness of breath. I don't know if this is necessary but i also have nearsightedness. Please help me understand what is wrong with me. Thank you.