I have these redish/ pink bump by the back of my tongue they don't hurt or anything can you tell me what this is?

Normal? Circumvallate papillae are dome-shaped structures on the human tongue that vary in number from eight to twelve. If there is only one, is something else. See oral surgeon for exam.
Circumvalate Papilla. These bumps are always present in the back of the tongue, look slightly red and form a V-shape that points backward. If concerned see your dentist.