Under my tongue is sore on right side and maybe swollen. left side hurts white/red sore. what is it and do i go to dentist or doctor?

Oral Surgeon: I advise you to see an oral surgeon. They are highly trained in oral pathology.

Not a GP: Oral conditions are usually not easily diagnosed/treated by general physicians. However, an ENT should definitely be able to help you if you want to see a physician. If you prefer to go to a dentist, you have 4 good choices: general dentist, periodontist, oral surgeon, or oral pathologist. All of them have extensive training and experience with oral lesions. My personal 1st choice is oral surgeon.