Annoying throat after being sick

Nearly after every cold, flu or virus that I get (recovery stage), I seem to go through a battle of not being able to go to sleep for 1 whole night. My throat tingles a bit, and I constantly have to swallow or cough (like every 30 seconds or so!). The slight tingling sensation, small amount of mucous in my throat, and unwanted build up of saliva is what keeps me awake. This goes on for hours and hours, and there must be something I can do!

Is there any home remedy or over the counter product that would assist with something like this? I have tried throat lozenges and hot tea to no avail.

Thanks.