Bronchial Pneumonia maybe.
Gosh I hope not!
“Dry itchy cough”
eyedigress may be right. I had the same persistent dry cough 3 years ago, would not go away. Ended up going to ER when I could not catch my breath. X-rays showed it had developed into a severe case of Bronchial Pneumonia. Huge doses of antibiotics worked to clear up the immediate problem but have not been the same since.
Seriously, see your Dr. asap.
Good luck, ConservativeMan55.