sending prayers and hugs.
i know how difficult this can be. my dog has had stomach issues for the past 2 years. she was diagnosed at first with gastritis and was always on antibiotic and pepcid; then this past november she was diagnosed with pancreatitis and was put on RC digestive LF, but then relapsed. was admitted to the ER (long story there) and the ER vet said she might have IBD and put her on purina pro plan lamb and rice. she can't have anything else.
best of luck