Sorry to hear of your reaction. Finding out an allergen in a perfume (or an allergen in general) is very difficult because perfumes can contain hundreds of molecules. An allergologist can design a skin patch test with a couple dozen molecules to see if one can identify a family, but often, it is quite hard also for the allergologist.
What was the offending perfume?
Half joking: if the offending material was natural, IFRA will pay you so that they can ban yet another essence. If it was a patented synth on which one of the aromachemical companies makes $$$, you'd better be silent or they'll shut you up.