Hey, i have this issue like 4 times for few years, i noticed one small white spot on tonsil which comes and goes in a few days if i just ignore. i don't think its tonsil stone. i don't feel any pain or fever due to that. should i be worried? normal?

Likely tonsil stone: Let's assume it is located on/in your tonsil. Sounds like a tonsil stone from your description. They are very common. They come and go. Sometimes painful; usually not. Not sure why you don't think it is a tonsil stone. Doesn't sound like it is anything you should worry about. While not "normal," it is acceptable as a "normal" variation. One test you might do is to taste one of these. Horrible!