Could all my symptoms be due to anxiety, stress and diet sensitivities or is it something more serious?

Hello,

Currently I have been extremely worried, anxious and stressful about my health for the last year and a half, ie an extreme hypochondriac. I have been experiencing painful sensations around my chest/rib area that come and go fairly fast but does not feel like a tight band as described by the MS hug. I have had a strange tingling sensation in my left leg (lower part of left leg) as well as left foot. It burns very slightly occasionally and my left toe feels a bit numb when it is cold outside (noticed it last year). I get painful sensations in my right eye (more of a dull ache) but not sure if this is related since I have been diagnosed with a slight astigmatism in that eye and have not been wearing glasses so could just be eye strain since I have no vision loss or anything like that. My left eye sometimes gets sore too but less often than the right. I also suffer from tension headaches all the time and am constantly anxious and worried that I may have multiple sclerosis.

I went to the doctor who referred me to an endocrinologist. The endocrinologist performed a series of blood tests, all coming back normal, as well as a brain and spinal MRI which came back completely clear (the radiologist is a family friend and he seems to think there is no way I could have MS based on the images).

I am yet to see a neurologist (going later this month due to poor availability). After all the tests, etc the endocrinologist told me that all my symptoms could be anxiety and stress related, especially since I think about it 24/7. I do not know how anxiety and stress could cause what I am feeling but I do know my mum went blind for a period of time due to stress when she was in her early 20s.

Lastly, (sorry I know it's long) I get random burning and twitching sensations in many places around my body (right upper back, right arm, etc). Whenever I get nervous/stressed I tend to urinate a lot more frequently (has been like that since I was a child - I am 19 at the moment and am a male). My bowel movements have been fairly consistent but I might have gluten or dairy sensitivity - could this also cause the symptoms I am feeling?

Basically, could all my symptoms be due to anxiety, stress and diet sensitivities or is it something more serious? Thanks very much!