So much of your post could have been written by me. I have had this pain in the same general area where yours is but up higher in my back. I've heard that Gall Bladder can cause pain up into your shoulder but of course I'm convinced it's lung cancer (I have suffered with health anxiety/panic almost all my life - I'm 65 now but other than "thinking" I was dying all these years, I've basically been very healthy). I originally thought this pain was the result of lifting a heavy piece of furniture but, as usual with me, it's evolved over the past two months....now I feel pain in the front right under my ribcage too and I notice it usually (but not always) gets worse after eating. As you said, however, sometimes this back pain goes almost completely away, as when i'm home sitting at my computer or lying in bed (where tension is less maybe?) and sometimes it really bothers me. As opposed to you, however, I also have a horrible phobia about
doctors, tests and hospitals and avoid them at all costs. So I just sit around being neurotic, convinced I'm going to die anyway so why go to a doc and have him tell me. It's such a stupid way to live, I know, but one I've never been able to conquer. I'm sure in your case, however, if you've been to the doc and had tests, you're probably fine, just suffering from some form of IBS. I too think maybe all these stomach issues I've had over the years may well be IBS too - sometimes my symptoms are gone for a few years and then they come back again with a vengeance for a few months....and the pains can be in all different places and to varying degrees of discomfort - but this pain in my upper back is worse and more persistent than it's been in other years. I spend so much of my life worrying about
being sick that I might as well be.....you suffer just as much even when it's all in your mind.
I wish you good luck and hope you'll keep posting your progress.