Trebeck, I feel your “pain”. My 14-year-old son experienced the UCL inflammation for the first time in early April since he started pitching at 11. It was not due to over-pitching. The X-Ray showed no tear and his growth plate was completely closed. He just came back and pitched in his middle school championship game over the weekend and did well and they won. The moral of the story is that you need to learn to “take care of your injury”. You need to allow yourself to heal and you are still young and I read your posts and I interpreted it as you “rushed” back to pitching too soon.
I know many coaches thought I am crazy because I taught my son NOT to throw at “top velocity” most of the time. The goal of a pitcher is to “disrupt” the batter’s timings and forms. There are different strategies in pitching to top of the batting order vs. the bottom. This is particularly true in little league or youth league. My son accumulated 110 innings from Sep., 2015 through Jul., 2016. I recognized it was way too much, so I made him took fall season off and he ran “cross country” to build up his lower body and stamina.
I know you want a “miracle” fix, but you really need to take an “easy”. You have long road ahead of you.