Hello, As it all started from a tick bite when you were fifteen, unfortunately you may have gone through Lyme disease. Good to hear you ve been recovered, however, you are still suffering of its consequences on joints. Regarding your gluten-free protein shake, it s possible that eliminating gluten from your diet could be helping with your symptoms if you have a gluten sensitivity or celiac disease. However, it s important to make sure that you re still getting all of the nutrients that your body needs. Again, I think you should get retested for Lyme disease first and need to discuss with your caring doctor further. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Albana Sejdini, General & Family Physician