I had a small hole on the top of my tongue, like a taste bud was mising.  There was another tastebud beside it a little inflamed. now the hole is white like a canker but now ther eare little red dots around the tip on the top and sides of my tongue that are not raised
With your query, it is well mentioned that you are aware of canker sores, so I hope you are sure about it. Do you remember whether it has started after taking some food if so what is it and for how long been it is present. Second one is it symptomatic or asymptomatic? Do you have any burning sensation while taking any hot or spicy foods? It would have been Better if you had mentioned whether you had it after having some food or just like that simply it started appearing anyhow after reading your query either it has an allergic reaction or an inflammatory reaction. Usually these things happen after having some strange food to which you are not used too. You mentioned that sides of the tongue too so rather than taking suggestions I would say you better visit your specialist dentist like who did MDS in oral medicine. Hope this is useful