San-sama
This is Kawaguchi Hidetoshi. This is a humble answer to the question.
It's really painful that you have been hospitalized due to a mental illness, and even though there are no abnormalities in the examination, physical pain has also appeared...
There are no abnormalities in the examination... but they suffer with severe pain... there are no abnormalities, just because no diagnosis has been made, understanding and support from those around them cannot be obtained, and they suffer even more...
I know that there are places where it is difficult for the world to understand that there are diseases such as collagen disease, fibromyalgia, autoimmune diseases, etc., where the cause has not yet been sufficiently clarified, and treatments have not been established...
If you really don't understand these diseases, you may sometimes be viewed with severe prejudice, whether it's because you just want to skip it or because you want to have fun, and you may not be able to endure double suffering or triple suffering...
I think San-sama is probably fighting in the midst of such suffering...
To be honest, don't think that you have no choice but to fight with your own strength, don't force yourself into isolation, and you can communicate with various people or disseminate information so that everyone around you can understand the illness you have; for example, if it's not impossible, you may be raised in a voiceless voice so that people can understand it on blogs, SNS, etc. I don't.
Of course, there are scary aspects of using real names on the internet, so I know it's OK to be anonymous, and comments sections etc. are also regulated, so I know that it is necessary to think carefully about privacy issues.
Eventually, as communication increases in various ways, you may receive advice for improvement and information on treatment cases, and it may lead to exchanges, encouragement, help, and support with people who have similar suffering. If possible, you may also find a way to complete healing.
At any rate, I ask for your support, just so that you never keep pushing yourself forward.
Kawaguchi Hidetoshi Gassho