Keep on working with your drs, sometimes it takes time, persistence and luck. Things don't always show up definitively on testing, imaging or blood work, it takes many follow ups and a Dr that really wants to help....
If they stop being helpful ask for a referral or seek second opinions on your own..

Make a concise list of all your symptoms can be helpful..
Start with the main issues and work down to less bothersome.. Give a copy to each Dr so they can have it available in your records..

It may be a combination and not 1 condition alone..
Explore some of our forum topic sticky threads that you might think related..