What could this be

[Dralingfox]

They have been there for a weeks and are quite painful

I don't know, but you need to get that looked at asap. Maybe go and see a pharmacist tomorrow.

Any lesions elsewhere? Could be hand, foot mouth

Geographic tongue? Ever had it before?

I thought this too. Go to the pharmacy for advice or a dentist. Paracetamol if any pain and avoid spicy foods. Can also be caused by vitamin deficiency, so maybe look at getting a multivitamin.