About 2 weeks ago I noticed a slightly sore bump on my tongue. I thought it was an enflamed taste bud since I get them fairly often due to the fact I eat alot of spicy food. The bump did not go away but stopped hurting. It is now hard and almost wart-like in consistency. It has an almost perfectly uniform hole in the middle and it is almost perfectly round. It has gotten a liittle bigger but not much @ this point. What is it and should I be worried.