Could my son's joint pain be rheumatoid arthritis?

Hello doctor,

My son has been experiencing joint pain for about four months now. It initially started in his knees and ankles, but now it has spread to his elbows and wrists. In the mornings, he feels very stiff, especially in his knees and wrists, and it takes around 30 minutes for the stiffness to subside. Sometimes, his joints become swollen, and his ankles feel warm. I took him for some blood tests last week, and the results were as follows: his ESR was 45, his CRP was 35, his rheumatoid factor was 60, and his anti-CCP antibodies were 120. The doctor did X-rays of his knees and wrists, but they didn’t show anything serious, just mild swelling. He has also been complaining of feeling very tired and is finding it hard to focus at school. The pain makes it difficult for him to play with his friends and run. I have tried giving him pain relievers like ibuprofen, but they don’t seem to help much. He is 9 years old and weighs about 70 pounds. There is no history of arthritis in our family.

Do you think this could be rheumatoid arthritis, or could it be something else? Should I take him to a specialist or try a different treatment? Additionally, what can I do to help him with his schoolwork while dealing with the pain? Please let me know what steps I should take next.

Please guide.

Thank you.