The symptoms I have had that started with a feeling of a sore throat and something in my throat are still there.  The sore throat would come and go before and know it is there everyday and is more like a pain than a sore throat feeling.  Also, I feel something in the back left side of my mouth, not so much in my throat, but around were my uvula hangs down.  I think it is my left tonsil.  
I have been going back to my local ENT for a monthly follow up and he does scope me and says he does not see anything abnormal.  When I had a barium swallow done after my initial ct scan it stated that my tonsils were slightly enlarged.  
The ENT stated that the only other test he would  suggest is a ct/pet scan.  But, he does not think my insurace would cover it.  
If this was a cancer would there be other symptoms or some type of change by know? I have had this going on for six months know.  Also, is it possible for there to be pain without the ENT  being able to see a growth?