I think my shoulder pain was between the joint and the neck...kind of in the collarbone area. Still, nerves can refer pain all over the place. If you can get up and do some walking--it doesn't have to be a lot. It might help. I could feel a direct relationship between walking and shoulder pain. I agree...that pain is the worst part!
Yes, my tummy and wrap are very reactive and I get gastritis regularly. The Carafate suspension is wonderful, as it coats the esophagus, wrap, and stomach and the coating lasts up to 6 hours. Even though you may not notice an immediate improvement, it will, over time, protect the delicate tissue and allow it to heal.
I couldn't live without my Carafate. If you space it 30 minutes away from the Carafate, you can also take a liquid antacid, which seems to help as well. Just remember to take the Carafate an hour before or 2 hours after meals.
Also 2 hours before and after meals (although a pharmacist said that if you take a med, you could shorten the time up a bit, and take the Carafate maybe 1 and a half hours after. I know it's hard to fit it in...especially when you're eating small meals. I would guess that if you're not eating as much that it won't take the full 2 hours to empty your stomach...you could probably fudge a little on timing there.
While you're healing, anything that can relieve your poor stomach will be a help.