Palpitation and anxiety after angiograph

While working I had burning sensation in chest followed by pain in both arms. Then I take rest and after 2 weeks same thing happens but this time it was bad. So I go to medical and and found some problem in my ECG give me some emergency tablets and send me to cardiologist asap. Cardiologist did angiography and found 90% blockage due to clot they immediately performed angioplasty and put stent. After this everything was normal I was taking rest then suddenly one day I woke up and found my heartbeat was very Rapid I I go to to emergency they did ECG and Eco and found that everything was normal. After that same things start to happens every now and then I visited emergency at least 3-4in 2 months. My heart rate was 140 BPM but Rhythm was normal I have no idea what was happening and now I have anxiety that it will happen again at any moment so I am not doing any activity. Right now I am taking medicines as below.1) concor 2.5 in morning at 10 2) Daplatt CV 20 10 night. 3) nexito plus 10pm.