Hi, I understand your concerns. Like your doctor said pain caused by appendicitis would not allow you to walk. If I were your treating Doctor for this case of severe pain in right side of abdomen, I would come up with two possibilities, these include: The first possibility is of Peptic ulcer disease. Diagnosis can be confirmed by upper GI endoscopy. Try raising the head of your bed about four inches with blocks. It also might help to avoid eating or drinking for two hours before you lie down. To help control the stomach acid, one should not drink alcohol or drinks with caffeine in them, or eat chocolate or spicy or greasy foods. Also take some antacid but if the symptoms are severe, then you may need drugs like proton pump inhibitors. The second possibility is of any gallbladder stones which may present as such sharp pain radiating to the back. For this purpose you need to get an ultrasound abdomen. I suggest you to consult a physician and get an ultrasound upper right abdomen, upper GI endoscopy to rule out any peptic ulcers. Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health.