Stomach pain and back/chest pains

My dad has been having stomach pain for about a month now. Doctor said he has a hard mass in his stomach but they need to do tests to see what it is. He often gets a sour taste in his mouth and gets chest/back pain. The stomach pain is usually a constant pain. After eating he'll get a pain and lump in his chest then the next day its gone.I Took him to urgent care last week and they think he can be a bleeding ulcer because he had blood in his urine. Still waiting to do a ct scan. But the waiting game is stressful!! Any idea on what he can have? Please help. Thank you.