Debilitating stomach pain for 4 days

Hey, my bf (36m) has been experiencing debilitating stomach pains, focused on the mid left side, with nausea (no vomiting) for the last 4 days. He has no appetite, and has been burping a lot (not a thing he ever does). He went to the doctor today, they told him to take Pepcid AC (famatodine) (does not seem to have helped at all), and ran some blood tests, some of which came back; CDC was normal. Waiting on the rest of the results. Doc said it's probably not appendicitis or diverticulitis. He's in a really bad way, I've never seen him like this and it's been pretty scary for both of us. I'm gauging at what point we need to go to the hospital, which would be extremely expensive and he is very resistant to. I'm hoping he's feeling better in the morning, but I've been hoping that for 3 days now. Really scared, and don't know what to do.