Girls, could you please tell me if anyone had something similar... Aft…

Girls, could you please tell me if anyone had something similar... After childbirth, I was in so much pain in my joints. Today I went for an ultrasound, they diagnosed me with (rheumatoid question mark) arthritis... My joints were all inflamed. I'm only 25 ? I will definitely go see a doctor. Has anyone experienced this before? What did they do? I don't want to stop breastfeeding, the doctor doesn't know what medications to prescribe in that case. It's such a strange feeling. It even makes me feel ashamed that my joints already hurt like an old grandma's.