Hi, not sure if this information will be helpful to anyone, but I too, have been having problems with always having to clear my throat.  I've been on the web to do research, and I am currently seeing my doctor who precribed something for acid reflux and allergies, as well as doing blood work.  What I finally found as a solution is the fact that I have allergies to or sensitivities to gluten(wheat products) this included all breads, pastas and pastries.  This type of sensitivity is also closely connected to forms of candida.  I could go on and on, but you might want to look into gluten allergies as the cause of the throat issues.  As for myself, I still have some problems with clearing my throat but nothing like what I was having 3 weeks ago.  I think the acid reflux medication is helping and is the fact that I've stopped eating anything containing wheat.  Good luck.