What should I do if I feel that the doctor gave me wrong diagnosis?

Talk to the doc. It is your right to have your medical diagnoses and care plan described to you so that you understand it. Not everybody is a great communicator. Sometimes, when mds get rushed, they forget that they speak a different language and vocabulary that you do. Every vocation has its own vocabulary. I think the patient will often tell me what the diagnosis is, in their own language.