I usually post on the acid refux boards but saw your post here and thought I'd reply.
It sounds very much like you have what I suffer from: LPR, or laryngopharengeal Reflux. You can get a lot of info if you jump over to The Acid Reflux board, but I suggest that you see a gastroenterologist or ear nose throat doctor. They will most likely put you on antacid meds or PPIs which are the standard course of treatment.
I've had the dry hacking cough, worse in morning and evening, but luckily not too bad when I'm asleep. The sore throat that never ends. yes, I know exactly what you are talking about.
Meanwhile, I suggest modifying your diet, gargle with warm salt water (it helps trust me), and eat small meals, and nothing too late at night.
Basically, the fun in life is over
Sorry to share this but it's better to have information than to be wondering what is wrong and think even worse thoughts.