I'm at a show for a band I've been wanting to see for years and I'm having a hard time fully enjoying myself because I feel like I have the joints and muscles of an elderly man (I'm 19). I snuck off to the bathroom because the venue doesn't have seats, and I feel bad, but I literally can't continue to stand right now. I normally carry a bottle of advil, but I didn't wanna carry my whole bag to a punk show

This has been progressively getting worse since I was 5, on a daily basis I now have severe back, neck and shoulder pain and if I've had to be on my feet both of my legs from the knees down feel like they're literally burning. I have not had a doctor take me seriously enough to try to figure out what this is beyond checking me for scoliosis