*Sorry we were having technical difficulties earlier, so here is what I wrote for you in the chat and you can respond at anytime.
Hello I believe I can help you with your concern
I am so sorry that you have been experiencing these symptoms, I can imagine how this must be distressing for you
Since it seems like you have ruled out most physical causes for your symptoms, it appears the cause of your symptoms are psychological in nature. The most typical psychological cause for your symptoms may be a mix of anxiety
and depression. The physical symptoms you described can be attributed to depression and anxiety.
Here are some links that describe the physical symptoms of anxiety and depression in more detail for you.
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The predominant non-medication techniques for these symptoms would be Cognitive Behavioral Therapy (CBT). I can teach you some of the techniques of CBT and recommend a couple good CBT books, but I think for your severity you may want to consider a therapist's help. CBT has a premise that your symptoms are caused by negative thoughts, so if we change your thought process to be more positive and objective as well, then your symptoms will lessen
So this link may help you, it contains a technique I use with patients called a thought record. It will help you keep track of any negative thoughts you have. You put the negative thought on paper, the emotion accompanying, the evidence to support it, and the evidence against it. Then I want you to come up with an alternative thought for the situation (more objective and plausible). This will help you change your way of thinking to be able to think more positive and not automatically go to a negative type of thinking.
In addition, these two worksheets are very good at helping lessen anticipatory anxiety and helping you focus on the big picture and the objective/positive thoughts and outcomes.
Also individuals with these symptoms of depression and anxiety also have a poor coping mechanism, so this worksheet will help you develop a better coping strategy to manage your symptoms better.
This is a link for something called Progressive Muscle Relaxation that can help you create a long term calm by using muscle tension and release techniques; it can help manage your anxiety and depression better and is very similar to a style of meditation
In addition, these books can be very helpful as well.
Now for the supplements, the St. Johns Wort is very effective, also Omega-3, Glutamate, and Valerian root can be added to improve your mood and lessen your anxiety/depression.
For medication, the use of an SSRI antidepressant, I would recommend Escitalopram at 10-20mg or Sertraline at 150-200mg, in combination with the use of benzodiazepine (e.g Ativan, Xanax, and Klonopin) are effective in managing anxiety and depressive symptoms.