What should I do?

First off I'm sorry this isn't in a the right topic I don't know where to post this. I am a very sporty active person but I suffer from really bad headaches 24/7  I have an iron deficiency and I am taking tablets for that but I have also been to a chiropractor and she said that my spin is pinching nerves which cause headaches but after seeing the chiropractor for a while I started getting sever back pain so instead I went to a physio which helped a little but not much. I have told my parents that it's getting worse and asked to go to a spinal specialist but they keep on saying it's because I'm not fit and tell me to exercise more even though exercise causes more pain. I feel like they don't actually understand how much pain I'm in daily. How should I convince them to let me see a specialist about this?