My whole set of lower permanent teeth is hurting badly ever since a little bit of a molar (i think) appeared on my gum. but it isn't the wisdom tooth. what should i do?

Need X-ray : See your dentist so an x-ray can be taken of the area to see if you have a tooth issue or not. Hard to guess without an exam and x-ray . You can take some advil (ibuprofen) in the mean time to try to control the pain

Wisdom tooth: Most likely it's a wisdom tooth. You should be seen soon.

Could be many things: Without an exam and x-ray, we are all just guessing. See a dentist asap. Tartar buildup is often mistaken for teeth (or extra teeth). This can also cause discomfort in a region/area.