My tongue for the last 6 week has been sore tingly and sometimes burns when i use mouthwash worried it's serious illness?

Change habits : Like changing your mouth wash and toothpaste, your diet, are you on any meds.?, and see if changes happen, if not consult a doctor.

Sore tongue: You may be sensitive to the mouthwash. The first thing to do is to stop using the mouthwash and see if this stops the burning tongue. If it continues see a dentist to find out what is going on.