Hi Linda,
According to Hippocrates, “All disease begins in the gut.” And that pretty well defines my position on the issue. Most of us have found that when our MC is finally resolved, just about all the other satellite issues fade away also.
I'm sure that Polly is right on target about your arm, namely that the symptoms associated with your arm are probably due mostly to the fall. It may eventually get better on it's own, though. About 25–30 years ago I had a limb break out from under me while I was climbing down out of a tree. After that, I couldn't lift my left arm enough to get my hand more than a few inches above my head. After about 20 years passed, I finally assumed that it might turn out to be a permanent disability.

But guess what . . . now that I no longer work as hard (I used to spend a lot of time stacking bags of corn on pallets, and then re-stacking them when I delivered them to feed stores), I notice that my left arm has the same range of motion as the other one.

Apparently, I never allowed it to heal properly, because I was always using it for hard work.
I'll give you another example: About 10 or 12 years ago I slipped on a puddle of water while pulling a ton of corn on a pallet jack into a store, and I fell on my tailbone. It refused to heal, and it bothered the heck out of me for years. Then one weekend I had to have emergency abdominal surgery (due to a blockage caused by a stenosis in my sigmoid colon). Fortunately I survived, and after taking it easy for about 6 weeks while I was recovering, I discovered that my tailbone issue had mysteriously disappeared.
I think the moral of the story is that it takes more than time to heal any injury. IMO, the key to healing is to absolutely avoid continually insulting an injury, if we expect it to heal. The same applies to MC, of course. If we continue to insult our gut with foods that we know it can't handle, and all sorts of other crap to boot, we shouldn't be surprised when it doesn't heal.
Obviously that last remark is not directed at you, because I'm well aware that you're doing everything humanly possible to allow your gut to heal
And I totally agree with Polly about supplements in connection with healing MC. My take on trying to force healing through the use of supplements is that they simply don't work very well for most of us. IMO, more is less, and vice versa.
Incidentally, you should never sleep on your right side, not just because of your arm, but because that positions part of your stomach higher than your lower esophageal sphincter, thus establishing the potential for acid reflux. Never lying on one's right side is the first rule for resolving a GERD problem.
I see that your 1-year anniversary is coming up. You are almost 1 year closer to remission, and it should happen sometime soon, with any luck at all. In China, this is the year of the horse, but in Pennsylvania, surely it will be the year of remission.
Tex