Dealing with Chronic Cough: Any Suggestions?

Hi. Every time I get any illness that irritates my throat I get a really annoying cough that lasts for weeks and weeks sometimes. My throat is so incredibly reactive. Currently I am just recovering from Covid and a sinus infection and have a little bit of post nasal drip that is triggering the cough. I’m not coughing much out so a lot of the time it’s dry and makes my throat feel almost strangled. It is really taking a toll on my emotional health. I use a humidifier, drink lots of tea, have an antihistamine nasal spray but it just won’t quit. Any ideas? And how long do these symptoms usually linger for you?