Yes, you might be gluten sensitive. It could be other reasons too. But I’m suffering from food allergies & I went for a test a few days ago. Joint pain is one of my symptoms. Gluten is in allot of grains. You can go for an allergy (blood) test for different foods, or/& you can get a gluten sensitivity test too. The other test you can do is for celiac disease but I think they take a biopsy from your stomach for that. I’m hoping I’m not gluten sensitive & it’s just wheat or something. If it’s gluten, then my diet would become very restrictive. Here’s an article that explains it more link. Good luck :)