Chest pain. Need to go for ct angiogram?

Lingering chest aches on and off for 8-9 months. Persistent for last 10-11 days especially while climbing up on stairs. Feel pressure on left chest side. Covid positive twice last time in April. TMT done twice in Apollo in this year. Came negative. Thrice ECHO. Came perfectly normal LVEF 60%. Also had stress Echo- Normal. CT coronary calcium score was zero. Been it ER many times in last 6-7 months, Twice in last 15 days. ECGs and Troponin came normal. Many cardiologists say that it is unlikely CAD probably post covid. But they say I can go for CT angiogram if I need to be sure but according to them that they are 99% sure that it will also come negative. I want to know do I need to go for CT angiogram ? I had my 3 CT scans this year only, twice HRCT ( for covid-normal) once for CT calcium score. So I'm apprehensive that this many CTs can harm me. I take metoprolol 25 mg for my slightly elevated BP. And I'm obese ( 182 CM and 98 KGs)