First: With the exception of extreme health issues (e.g. Cancer), you likely have a good chance of resolving your health issues. Don’t be discouraged by your chronic pains and think you have to now live with the pain or health issues for the rest of your life. Tackle your health issues like any other engineering problem: understand the problem, make a plan, execute, monitor progress, and iterate over this process (e.g. revise your plans). If you do not take action, nothing will change.
Second: Stress is a killer. I’ve had to visit the emergency room twice because I thought I either had a heart attack or I was dying from high blood pressure. I was way too into my work (due to both passion and commitment), that delays with my projects gave me high mental pressure. Upon re-evaluating my life, I asked myself: which is more important, my work or my health? Once I started prioritizing my health and started pushing back on unreasonable timelines, my stress is gone and none of the chest pain, headache, and high blood pressure issues have come up again.
Last but not least: Your body is a very complex machine and you need to learn how to use it correctly. I had a very sedentary lifestyle and had many chronic pains, e.g. heels, ankles, knees, hip, elbow, wrist, etc. My body was so weak that I even injured my neck and back once just by sleeping in a not-so-great position. I found an awesome PT who specialized in holistic physical therapy and he helped address issues from my feet all the way to my neck. I am now able to resume all the activities from my younger days such as DDR & tennis. There’s too much to explain here but I have two key takeaways: one is my body was extremely tight & inflexible and PNF treatment from my PT was needed for recovery, and another is I just didn’t know my body and muscles well. I did not know how various muscles work, how to use my body & muscles effectively, and what exercises to do and their correct form. Learning and doing the exercises properly and frequently changed my life. Btw: I highly do NOT recommend all the YouTube fitness videos - you simply just cannot tell if what they’re saying is correct and whether their suggestion is even the correct remedy for your problem.
That is all. I wish everyone good luck in addressing their chronic pain!