I have seen other trainees with the exact left "inside elbow" pain that you describe. This usually (not always) occurs when they are doing a high degree of "Chin-ups" (palms toward you) as opposed to "Pull-ups" (palms away from you).
Try doing Pull-ups exclusively for a while and you may see a reduction of pain.
Also, I have found that you can make some of the best gains in some areas, when other areas are injured. Try switching the focus to your lower body, or pushing movements, at the (temporary) exclusion of all pulling movements. I had one trainee who shot over 25 dead hang Pull-ups, only after he incurred a knee injury! That knee helped him out in other areas!
Stay upbeat, don't let the injuries beat you mentally!