High blood pressure for 7 years. Drink.

It was 7 years back when my normal than higher blood pressure was first identified during a routine check-up. After monitoring for a week I was diagnosed with hypertension and was put on hypertension drugs. The medications still continues. My yesterday's readings were 170/120. The current medications prescribed are Nexovas M 50 Telista 40 and Minipress Xl 2.5. I am also having a 15 years history of depression and for the past 4 years anxiety disorder has also been diagnosed. I'm on those medications as well. My cardiologist suggested to get myself checked for pheochromocytoma and my urine and blood tests were done. Urine reports showed normal counts but blood report showed high elevated levels of metanephrines and nor metanephrines. Was referred to mibg scan but no tumor was detected. Kindly suggest possible reasons for this high levels of blood pressure and also the elevated blood levels. Does it suggest anything else since pheochromocytoma is ruled out. I don't smoke nor do I drink.