My wife have started to feel her chest becoming tight. she said it's as if something is applying pressure against her chest. must i take her doctor immediately.

Time to see a doctor: Chest pressure or pain, with or without trouble breathing, are signs that she should talk with her doctor right away or go to the ER. In adults, chest pain can be a heart attack. If it turns out not to be myocarditis, heart attack symptoms, or anxiety attack symptoms, the ER will also have checked for problems such as a collapsed lung, pneumonia, medication reaction, or heartburn.