Sue, I’m so sorry to hear of your sister's health problems. I'll pray that this gets solved soon and that you will have a safe trip out to visit her and be able to see her get better.
We have a friend whose wife had to take him to urgent care on Nov. 8th due to some severe pain. Tests showed an inflamed pancreas. They did surgery to remove his gall bladder the following day. Subsequent MRI showed no stones left anywhere and his pancreas had returned to normal. It was a little mysterious how he recovered so soon following the surgery but his family is just very grateful for all the prayers that came his way.