Hi An_243267,
I am sorry to hear you are having pain. What you are describing sounds like a condition known as burning tongue or glossodynia. Typically this presents around the anterior 1/3 of the tongue, symmetrically, and most often on the lateral borders and tip of tongue. A condition known as geographic tongue can also occasionally cause this feeling of burning.
In general, although I cannot diagnose through a post online, the tongue looks perfectly normal, without sores or red areas. The pain typically gets worse through the course of the day however, it is not enough to wake the person up at night. Avoiding hot or spicy foods helps however this is difficult to do all the time.
If the discomfort is symmetrical, right and left sides feel mostly the same it generally means that there is no true disease, however I do suggest that you see a dentist and if possible a specialist in Oral Pathology or Oral Medicine to confirm that the tongue is normal.
Burning tongue or glossodynia is often misdiagnosed as an oral yeast infection or "thrush" and treated with anti-fungal agents. Although this may provide some relief (real or placebo) if the patient does not have an actual infection the burning usually returns. Doing a fungal culture of your mouth will not be able to determine if you have a yeast infection as yeast is a part of the normal oral flora and it is supposed to be in your mouth, it is healthy to have it and unhealthy not to.
The best advice I can give is actually to try and ignore it, do not look at your tongue, don't poke it or pull on it, don't look at it in a mirror, all of these may cause chronic irritation to the tongue and make it worse.
I hope you are feeling better soon.
Dr. Gwen Cohen Brown