I'm really worried about my brother. He's been having some chest discomfort and mild pain that sometimes happens on the left side and other times in the center. He gets really nervous, and his heart rate spikes to around 90-98 bpm when this happens, but when he's more relaxed, it goes back down to about 68-72 bpm. He runs on the treadmill for 20 to 30 minutes at least five days a week and doesn't feel any discomfort during that time. Although he has an acidity and GERD problem, he's finished his course of medication and isn't taking any other tablets. His sugar and blood pressure are normal, and chest X-rays came back fine, with an orthopaedic saying it's nothing serious and just suggesting vitamins. He also feels pain at certain points when the chest is pressed. With all these symptoms, I'm wondering if it could be his heart, acidity, muscular, or maybe even a nerve issue. Do you think an angiography would be necessary given his normal reports so far?

Since all the reports are normal ,advised a psychiatric opinion for diagnosis of anxiety and other conditions..