High pulse rate. Help from experts.

On 24th after 2 pm my pulse rate was 120 bpm And was stay till the evening when I when to the doc my bp was 160/100 and pulse was 132 bpm he asked for ecg and after seeing ecg he said my heart beats are high and cause for this is anxiety he RX, etilaam pro 20 1/2 in the evening and Met XL 25 mg in the morning and said if pulse increase have half etilaam pro after that pulse rate go down in half an hr but still I get high pulse rate for 2 hrs in morning and evening, I feel my heart beat when I lay down. Some times I feel happy and after that I get high pulse rate and when I check it get more and I feel fear for the same. I don't know what to do as I don't do exercise. Really think want to get over from this. Needing the valuable help from experts. Thanks and regards.