Looking in a mirror can imply looking at your self impression, i.e. checking on the impression you make on others. As you are seeing basically only your face (from neck up), the impression involves your self identity – who and what you think you are.

The tongue pertains to speaking. The spots on the tongue would indicate some error pertaining to what is said. This indication of error is apparently a source of emotional pain to you (indicated by pain on the body). The spots might also suggest some error relating to being “put on the spot” – put into an awkward position.

The sensation similar to having burnt your tongue might suggest having been “burnt” via your words, implying having been victimized. [Is it possible that you were “financially burnt” by agreeing to give money when you didn’t really want to ?]