We use the same things my little penguin does for our girls. Both girls have Ankylosing Spondylitis and the younger one also has Crohn's.
The younger one is allowed to be on an NSAID because her arthritis is so much worse than her Crohn's. Your GI would have to ok it though. It took some trial and error to find one she can tolerate, but we eventually did.
MTX also makes her very sick - severe nausea and dizziness, she was stuck in bed for 2 days every week. We tried 3 different doses and then decided to try other immunomodulators. She has been on Sulfasalazine and Imuran, but Arava was the one that helped the most (in fact, she is still on it). It doesn't help Crohn's though, just arthritis. It is normally used for RA but is sometimes used for juvenile arthritis or AS.
Pain management has also been helpful. We have done steroid shots into various joints. They both have Tens units that help with pain. We also use pain meds if absolutely necessary.
They both have tried a variety of medications for pain - from antidepressants and anticonvulsants like Notriptyline and Lyrica, to opioids like Tramadol and Oxycodone. Being on opioids is far from ideal, but we tried everything else and they were still miserable, so it was necessary. It has really improved my younger one's quality of life. It did take a while before we found the right one and the right dose so that she wasn't too out of it. She tried Tramadol, Vicodin, Oxycodone, Nucynta, Dilaudid and Morphine before we found one that worked well for but didn't knock her out.
Muscle relaxants like Flexeril can also help with muscle tightness or spasms (which can be caused by inflammation). My daughters would mostly use these at night, and only very occasionally.
Besides that, you really just have steroids - we have done oral, IV, and intramuscular and shots directly into joints. Also not ideal, but sometimes VERY necessary.
Heat and ice are favorites at night. My daughter has microwaveable mittens (from snuggables.net) that really help her hands with stiffness and pain.
Hang in there :ghug:.