If nitro gets rid of chest pressure should medical care still be sought?

Yes. Especially if first time, or if getting worse (more intense and/or more frequent).
Depends. Angina, relieved by nitro, can be a symptom of stable coronary artery disease if the pattern of pain (what causes it, how quickly it fades, how often you get it) is unchanging. Stable disease can be managed at home. Any change, particularly new angina at rest when it used to be only with activity, or if you are awakened, should prompt a call to your doctor or a trip to the emergency room.

Related Questions

Completed h.Pylori treatment. But now, I am having excessive gas, getting chest pressure/pain. My GI said its cause of overeating. But I dont. Any ideas

Sources of gas... Air in the digestive tract may come from variety of sources--maldigestion due to enzyme deficiency (ex. Lactose intolerance) or food intolerance (ex. Gluten sensitivity), fermentation by gut bacteria (as with bacterial overgrowth syndrome or changed flora after antibiotics), altered GI tract motility, excessive air swallowing, as well as inflammatory & infectious causes. Its easy to test 4 these. Read more...