well i might not have answers, but i do suggest if you cant find the answers you need, dont be discouraged from one doctor.
i've had knee pain for 4 years, at the age 17! Its caused me sooo much trouble and pain! I was stopping my life for it!
So i finally got into a surgeon he didnt care, or listen to me. it seemed like he didnt believe me. So he sent me to physio BUt that made it worse!
SO in the mean time i decided to take it into my own hands and saw another ortho.
Well right away he spotted something that could be causing my problem. ANd just from looking at my knees could tell it was something gentic. So after i saw him booked for surgery and hear i am now a month post-op and let me tell you a whole lot better!!
Sometimes it pays to push and push. Its your life and you have to put up with the pain and suffering!
Dont let them discourage you! Sometimes you have to stick up for yourself because they dont know what your going through they can only figure and they might not always be right!
GOOD LUCK

you deserve some answers to get some relief!