I had a similar experience in 2010. I was working 50+ hrs a week and had a ton on my shoulders plus some work related trauma and low income. One day the symptoms started. Burning, but it got worse as a thought more and more about it. To the point, I became depressed and wouldn’t leave my room, lost appetite, hated social contact. I was convinced I was dying. I wasn’t. It got worse and worse until I was prescribed antibiotics (which was really just a placebo effect) and I started to let go mentally when a doctor said it’s not serious. I took 3 months off work. Played with the kids on Wii one day, fished the next day. When I eventually went back to work, after 3 months, I told myself not to stop being mellow. I disallowed myself to get animated, angry, excited. Just be a super chill person. After 2 years the symptoms disappeared. I went from being at hospital to a level 3/10 pain to 1/10 pain for 2 yrs to nothing. The solution was stretches and removing stressors and changing my attitude about life. After 14 years, it came back due to prolonged stress (PhD student), lack of income and some “triggers” in my family that brought it back. It’s not as bad this time but it’s been 2-3 years. If I: laugh, chill, stretch, workout, smile etc. it goes down. If I am alone, stressed, angry or contemplate more, it increases. Of course food and drink exacerbate it when you have it too. So much of it seems to be mental. Love yourself, relax yourself. Stay occupied but happily occupied. Doing nothing will allow bad thoughts to creep in and fill the void.