My guess is it's a form of herpes.

I have noticed similar bumps in my throat, behind the papillae and surrounding my tonsils. My papillae seem quite swollen and i'm sure smoking doesn't help this any. I have the habit of creating a vacuum in the back of my throat to clear debris and mucous from my post nasal and tonsil area. ( sounds nasty!) but i think this may contribute to swelling of my papillae or any other bumps or lumps back there by drawing blood into them. I'm sure if you were to scratch your bumps they would be quite painful. I hope i'm not improperly playing down some kind of ear or tonsil problem but i'm just trying to suggest a possible explanation.
Doctors would know better than I of course.

i heard that they are part of the taste buds and are completely normal.

i would wait to see if it was just irritated.