Yes, you should see a doctor. The pain over such along time should be investigated. It could be from heart disease
, lung disease or something less severe, but still you should have it assessed by a doctor.
When your blood pressure was checked by the nurse, you were in distress (from the chest pain
). The stress would likely make your blood pressure go high. I would be surprised if it didn't. Also, a single reading can not indicate high, low or normal blood pressure. Several readings over time must used to make a determination.
See the links below for more specific information on angina
(chest pain) and blood pressure.