For the past 2 months now, every so often I have little white bumps (they look a little like cankers) that flare up on the tip of my tongue. They are not painful but just irritating and a little sensitive. Sometimes many bumps flare up and other times, maybe one or two flare up. Along with the bumps, I will get a bit of a scratchy throat. It does not hurt but like the little bumps, it just feels a bit irritating. Normally, the bumps will flare up and the throat will feel itchy for a few days to a week or so and then they will calm down only to reappear a week or two later. I did go see a few doctors at walk in clinics and they all said it's nothing to worry about but to be honest, I've been feeling really scared as of late because of this. Yesterday, I went to have a HIV blood test done just to check and I will hopefully hear the results soon.Any ideas what is wrong?