welcome to HM
The symptoms you are talking about are more about mental stress
.Mental stress is more tiresome than physical exertion.That is the reason of the fatigue
;tremors;dizziness;& difficulty in talking .Please try to control the apprehension;apply oil to head at night while going to sleep.And better consult a psychiatrist
so that you can explain your problem & he will advise you & if required give you some medicine.