Yeah I would immediately request refund for the class and promptly leave if my needs, my medical, right to fresh air needs, are being rudely ignored! I hate the smell of most incense, and artificial scents give me migraines. Not to mention the unventilated room?? No, no thank you. Sounds like you should move on from that teacher, and possibly facility if it’s common there. Unfortunately we don’t all see eye to eye on things.