Anaesthetic? How do you know your allergic? Had taccycardia, op abandoned, could someone help?

Hi there, I tried to have an op 2010. It was abandened due to being taccycardic, all my ecgs at the hospital including scan of my heart etc were normal? Why would this happen? im still not happy with my nose and no one has ever gave me advice. All the doc said was..no its rare to be allergic?! Thats silly as rare doesnt mean impossible and im left unhappy with my nose. Can anyone help?x