Hello - the sneezing and coughing does sound like some sort of allergic reaction. There are MANY naturally occuring chemicals in the HUMAWORM herbs. Stop the cleanse. I'll be glad to refund your money OR I can try to make you a custom blend with fewer herbs. Let me know which you prefer. Allergic reactions like yours do not happen very often - but you're right your extreme chemical sensitivity can't handle so much at one time.