I have had a sinus infection, which is going on 5 weeks now (almost gone)...so you have my sympathies. Still one of my ear tubes is partially blocked and hearing a little dulled on that side.
One thing to try, if you haven’t already, is to gargle every several hours with warm salt water. Just 4-5 ounces of warm water, stir in plenty of table salt. Should be enough for 2-3 gulps to gargle/swish/spit out. The salt seems to dry out the area on the back of the throat.
Good luck!
God bless you! I don’t know how you’re handling the blocked ear. When it happens to me, I just want someone to knock me out. I can’t accomplish anything when I have one.