I am glad your new doc is taking you seriously. My chest "pain" is more mild pressure with shortness of breath, lightheadedness, fatigue, drops in o2 when walking (only sometimes) etc. Since 2017 I have been to ER probably a dozen or more times, each time heart is ok. Stress tests unchanged from previous studies, halter monitors one or two isolated hiccups (the kind of irregular beats they take note of) but nothing consistent enough for real problems. Right heart showed an issue with oxygen levels being too high on the side of the heart that should be lower in oxygen, but because additional tests did not reveal a heart defect doctors are saving there is "nothing wrong" with my heart. Lung function tests normal. Basically docs say my chest pressure not heart or lungs, so I have appt this month with GI doc. I have acid reflux controlled with meds and a history of esophageal strictures. We shall see if GI doc can help find problem. Since all of this started I've gained 75 pounds and my ability to function has dwindled. There is real data showing issues, but so far my problem has not been found. Don't give up - I know I am not - your answers will come.