@deepakvss I'm sorry to hear about your problems. It's so distressing to know something is wrong but not to know what is causing the problem. I went through that for almost a year and a half before getting a diagnosis.

You say traveling is not an option but is traveling within your country to a major medical center a possibility? I found that they know so much more because they see so much more. I hope you can manage to go to one that's not too distant from you. I think that could be what you need to do to get a diagnosis.
Looking forward to hearing more from you.
JK