hip trouble

hello, my name is daniel, I just turned 17 and I’ve been to a lot of specialist to fix my hip which is exspected to have a form of tendonitis. I’m starting to get frustrated because all the docs are quacks and don’t help. I’ve had this for almost 4 years and it’s starting to get worse. It prevents me from doing almost everthing. It makes my hip flexor realy tight and the back muscle as well, and is starting to hurt on impact when I run. I’ve had multiple x-rays, and a MRI which they say are fine.I’ve also had some physicle therapy along with many medications and vitamins & herbs.I’m 5’8″ and 120lbs. have you ever heard of anything like this, and know anything that will help. I hope soooooo much that you do. please write back. Daniel