Josh, I also found that singing helped with my speech therapy...I'm sure my neighbors were not entirely thrilled, but the speed of words in a song helped with the slower pace of day to day talking. I became a white girl rapper in my shower as well, LOL.
I assume you are doing physio as well for the shoulder? If not get on it. I couldn't lift my arms past shoulder height for the longest time (about 4-5 months), then in the span of a few days, everything clicked. I've been doing slow weight training since then, and I was able to play baseball this year with my physio's approval. It has been great to get back to "normal". I was inordinately pleased last week when I threw out a runner from 1st to 3rd and I heard someone on their bench say "she's got a gun, don't test her".
Great that you didn't need a flap - it's a very odd feeling (mine came from my wrist). I used to bite mine all the time, now I know what it feels like between my teeth, so it's rare, but still creepy.
Keep on keepin' on!