So I was having bad heart palpitations, was constantly conscious of my heart beat and was struggling to cope had 2 ECG and old tests as well as 4 doctors apps checking blood pressure etc all was fine each time and I stopped smoking , and try to be healthier now but the problem persisted. Now my heart feels a bit more relaxed but I was having troubles breathing... Like I could not get enough breath and it caused me to panic a lot and focus too much on my breathing. I had a bad panic attack and started hyperventilating and had tingling extremities. Went to the doctor as breathing problems persisted and they suggested I have anxiety which I had been considering and prescribed propranolol 40 mg once a day.i tried one yesterday and have taken one this morning before breakfast. I am worried about the effects it will have as my chest feels rather strange and also how do I know if I even have anxiety? There does not seem to be @ trigger apart from me worrying about my own health? Is this possible cause of anxiety? I am so confused and wish I knew what was going on. What will propranolol do to me?