Hello
Thank you for posting your query at DoctorSpring.com
Many people have a relatively high heart rate. In absence of any symptoms apart from anxiety you shouldn't be greatly worried. Stress and anxiety, low hemoglobin, tobacco alcohol in excess and hyperthyroidism are some of the common causes of tachycardia. You should get a hemogram and thyroid profile. You could get a 2d echo and if that is normal you could start beta blockers or ivabradine
Feel free to discuss further,
Regards
Dr Vivek Mahajan
DM Cardiology