Had dental appointment yesterday to prepare back molar for crown. Half way through 45 min appoint i sensed strong acrid smell & strong taste in my mouth & then felt as if my top lip was burning & swelling. Asked dentist to stop to check but she said she didnt really notice it but i certainly knew something was wrong. She said maybe she had some "etching"? On her gloves which had then spread to my lips. My lips are not quite as red this morning but still slghtly swollen & one small red spot/blister on outer top lip. What should i do?