If it were me I would use the referral . I would think neuro muscular are the people with the right kind of knowledge to get you some answers . Today’s medicine is pretty specialized and nerve issues can be very confounding .
I know the feeling when it seems the Doctor doesn’t believe what you’re saying when explaining your symptoms . I think it’s because they don’t know how to help . Neuro IMHO should be your next step .
I hope things get better for you and you find peace .