The 5 Day Extended Patch Test is a common test for allergens in the US. If your doctor is a specialist, either allergist or dermatologist and is not aware of this test he/she is from the middle ages and stop going to that doctor, as he/she doesnt have a current education. Perhaps a family practice doctor would be unaware. It is an expensive test, but covered by most insurance plans and my Medicare and Supplement paid 100%. Contact control is the issue and ridding yourself of your pots and pans was necessary and of course internet research about all the hiding places like in jewelry and such will speed up contact removal. It is most common for those of us with Allergic Contact Dermatitis, ACD, which the patch test is for, commonly have multiple contact allergies. If you still have reaction you either are missing hiding places of nickel or you have other allergy's you are unaware of. You should get tested because you may have other allergens, perhaps not as severe as your nickel allergy, but with each repeated contact your symptoms become more severe. Identify these now.