It is unclear to me why you would assume it is RA. Your primary doc could easily order blood tests for RA to confirm or rule it out. But, it could be a myriad of different types of inflammatory arthritis, or just plain old osteoarthritis. You probably had steroid injections, which would work for any of those.
IBD related arthritis and spondylitis are diagnosed by ruling out RA and other serology positive types, like lupus. Since you do not mention axial arthritis (spinal), it is not likely a form of spondylitis. This is where the careful history taking is important. I have both enteropathic arthritis and osteoarthritis.
Jan 