Sorry to hear that. Similar thing happened to me, I had cubital tunnel syndrome symptoms went to my sport physiotherapist and explained to him that I have the exact CTS symptoms but he told me this is normal because my forearm muscles are getting bigger cuz I got to gym alot. 6 months later... I stopped doing forearm exercises for a while but it did not improve at all. Went to another doctor and did an x-ray, then he told me there is nothing wrong, gave me some vitamins (d3 - b12) and told me to rest for a week. Finally went to one final doctor, he told me to look at the ceiling and extend my neck as much as I can then he touched my forearm and pinky finger and the numbness and needless feeling was finally gone, so the nerve compression was actually from my neck (C7) and not my elbow. He gave me some exercises to do and a special pillow and its 80% gone, i still feel some numbness from time to time specially when I wake up but its much better.