Obviously this is a personal choice about taking meds but some could help you. For myself and though I have tried most of these nerve meds and am starting new course of meds I try to stay in the day with my fears. Also if you have support system like friends and family surrounding yourself with them when you start can help. So many meds list every possible side effect. When I was Neurontin I slowly increased and did not have any major side effects other then like pressure in my head for awhile and a little off feeling. Again I am not saying to take it or not just some thoughts.
I hope you get some direction and answers at the appointment. The unknown waiting for diagnosis is a hard time I do know that.