You have seen 2 doctors who said it was nothing, just taste buds
. An online doc rarely can compete with the opinion of a healthcare provider who actually has examined someone. Anyway, the taste
bud explantion sounds right. It certainly isn't oral herpes and doesn't sound like any other STD. Everybody has a row of 7-9 prominent taste buds
--not exactly a row, but arranged in a shallow V shape--running across the back of our tongues.