It does sound as if the ulnar nerve could be irritated in the cubital tunnel at the elbow. Avoid the bent elbow position for prolonged periods of time (for example, use a headset if speaking on the phone) and while sleeping. Keep up with the stretches. Avoid the yoga positions that cause the pinch for awhile (modify if possible). Be gently persistent. If the symptoms do not go away fairly quickly, however, or if you develop any numbness in the small and ring finger, it may be time to consult with an MD. Good luck to you!