Hypertension. Or go for angiography?

I was having BP of 180/100 but after 30 min it was 160/80 and pulse was 120-125 in Ecg and it reveals Sinus Tachycardia and after 2 hour it was 140/90 and a terrible occipital headache without taking any medicine. My Cardiologist has prescribed Betacard AM after seeing my all reports which were all Normal like Thyroid, lipid, Renal, FBS, 2DEcho. But Renal Doppler has some problem I have attached my reports and he is telling to undergo Renal Angiography but as I have seek second opinion from a Nephrologist he is saying it is just anxiety more specifically health anxiety and nothing else if u want I can write CT Renal Angio for u, just for your sake that u will not be bothering about Ur health I'm confused who is right whether the cardiologist or the Nephrologist. Presently My BP is around 140/80 in doctors clinic and at my home it is 130/80 but I'm taking Betacard AM every night. Should I Stop my medicine or go for Angiography?