I had the same problem. What I did was I dried the back of my throat with tissue, then I grabbed a hold of it, squeezed it, and it popped. There was a silicone consistency to it and a bit of blood. I gargled warm salt water and it seemed fine the next day. It looks like its gone and I did this two days ago.
I'm worried now because I've heard stories of people popping things in their mouth, and those things turned into cancer, which resulted in death.. I'm super paranoid lol. And a bit of a hypochondriac to boot. Good luck with ur uvula bump! Please update me on your situation.
I have the same problem (((( for a 3 months now. Nothing helps... doctors don't know what it is...
Did you find out?