Welcome to NeuroTalk:

Sounds like lots of suffering to me.

Have you had Vit D and B12 tested? Low D will lead to more easily contracting infectious diseases. Fixing it will give better resistance to infectious exposures.

Have you had thyroid tested? After babies are born, sometimes that is when the thyroid tests low.

Were your shingles on the arm or neck?

Autoimmune disease can present after pregnancies too.

But I am thinking you strained your arm lifting little children so much. Your lifestyle would have you doing that alot. I threw my back out once lifting my son when he was 8mos old, and had to call hubby to come home. Some women lift their children alot...
I knew a gal who lifted her 5 yr old boy alot and she threw out a knee removing him from the car once! After I threw out my back, I didn't lift my son much when he became a good walker.
We just went slowly everywhere. At home he climbed into my lap on the couch or in bed with me for closeness. (I was 35 then and my back could only take so much then).

Spurs do show on MRIs.

Have you tried icing the shoulder? Have you had herpes titres drawn (blood work) to see if they are still high? Do NSAIDs help at all?

I'd ask on our Myasthenia Gravis forum too. Just to see what they think of your eye issue.

There are Lidoderm patches, for post herpetic neuralgia, and with your diagnosis your insurance should pay for them. Have you tried them on the shoulder? Placement might be tricky, and you might have to experiment with them to find your sweet spot.