Hello sougata Mukherjee.

Many with Multiple Sclerosis have vision problems and cannot read large blocks of type/text. For this reason I was only able to skim your post.

You have had minimal testing done to determine what is or isn't wrong with your health. Anxiety/stress can cause a multitude of physical symptoms. I would suggest you see a Mental Health professional, a Psychiatrist for medication(s) and a Psychotherapist for Cognitive Behavioral Therapy(CBT).

I would also recommend a complete Physical with you Primary Care Physician(PCP). Your PCP can order testing and/or refer you to the appropriate specialist...if needed

Self diagnosing will not be helpful for you and can be counter productive. Obsessing over what you are experiencing is also not helpful.