What are the reasons for stomach pain in a 75-year-old with a history of rheumatoid arthirtis?

Hello doctor,

I am a 75-year-old male with rheumatoid arthritis. I have had bad stomach pain for six to seven months. The pain is intermittent during the day and wakes me at night. This is happening almost every day and night. I get bloated sometimes, and I have nausea and decreased appetite. I weigh 80 kgs, and it has been unchanged. Sometimes food will relieve the pain, but the pain returns within two hours. There were blood traces in my stools, but a colonoscopy was clear.

I am anemic. There is no previous history, although it has been ongoing for seven months. The pain seems to be on the right side of the middle and upper region of the stomach but can move around. Sometimes, the pain is in the range of 7 over 10. Other times it can be mild discomfort.

I am currently under the following medications.

1. Methotrexate 25 mg, once a week.

2. Folic acid 5 mg, once a week.

3. Aspirin 100 mg (enteric-coated), once daily.

5. Atorvastatin 40 mg tablet, once daily.

Please advise regarding the pain as I have little quality of life.

Thank you.