dental advice?

51 -F- Allergy to Sulfa, and the Primer used for artificial nails. Dental work patient, ie, crowns, pin build-ups, root canals, extractions, bridges.
Problem is: 10/06 I began restoration treatment at a new-to-me dentist, crowns, extractions, prep for a partial, comp fillings. Each visit for dental work, I am having unusual swelling of my soft tissue near topical/local anesthesia. Dr. says he has tried several types of locals. Long appointments. (2-3 hours) The latest visit (02-2007) he applied 3 crowns in one area, and composites on another area. The following day I had substantial external swelling near the mandibular block, between cheek and teeth lower right side I had what looked like acid burns, my gum line where the crowns were cemented turned white and lightly bled. My tongue on that side became swollen and rutted, I developed ulcers on the under side of my tongue, the side became rutted, and lip discolored. Never had this before , is it the methylparaben? topical? Local?