Severe ED. For angiography or ct angio?

I am 42 years old unmarried man. I am obese 110kg weight and 5 feet 6 inch height.  Asthma Montek AB and Formoflo inhaler, Asthalin 200mg rotohaler, High BP, High heart beat on walking upto 175bpm, and Cetrizen for urticaria. I have severe ED for the past 9 months. I am having Concor 5mg from October 19, given by cardiologist. I have done Echocardiogram in July 19 by a Cardiologist. Report is fine. I have done Endoscopy in January 19 by a Gastroenterologist report is fine. My HDL is 41, master health check up done in July 20, report is fine. Why ED problem? I don't do any excercise or walking. I am doing online business from home. Am I having heart blockage? Is there any need for Angiography or CT Angio? I am worried.