Long lasting congestion, tinnitus. Male.

Been congested since January. Was diagnosed with a viral infection. Wasn't given anything, was told antibiotics wouldn't have any effect. It started in my chest with pleurisy. Though that's gone my congestion remains. It's causing tinnitus. Which seems to follow whichever nostril is congested at the time. I did develop a very small lump next to my Adams apple, which has gotten smaller since it came. At one point it was fairly large. But has since gotten a lot smaller. Basically I want to know how long a viral infection can last on its own, or what I should do to get it taken care of. And the likelihood it could be something more serious. I'm not on any medication, antibiotics, or pain killers. I have no other symptoms of note aside from congestion, and ringing in my ears. 29 - Male.