I've been living with a chronic cough every day for the past 17 years and dystonia 4 nearly 3 yrs

I've tried everything I mean everything what else can I do I'm very very tired.

I cough also all the time...not as long as you have..I have Bronchietasis with Severe Allergies mixed it with a couple of other things I won't bore you with...I just take one day at a time..and pray for a god day...do some research on Google and it might help you....good luck...

Thanks

Have you tried swallowing some food grade coconut oil.  Try a google search, Coconut oil, cough.

I hope you can get some relief, soon.