Is it just Motrin or any NSAID that hurts you? If all meds are bad then try stretches. Look for back pain stretches online. There are a lot of good ones. I had to do Physical Therapy for several months and I was amazed at how stretches can make back pain go away.
Have you tried Aleve?My husband has stomach problems too and Aleve works well for him.I worked in drs office and they would give out rx for Naproxen Sodium for patients for inflammation and all it is is Aleve. Hope it helps!