How Can Panic Attacks Be Managed?

Hi I am 30 years old male. I have suffered from worst panic attack three years back and I am on medication doreme, lonazep & betacap from last three years with dosage increase or decrease. I tried to change doctors but at the end it became worse. Now my situation even after taking medicine I don t feel well. Cannot do to work. Feel tired and restless. Always panicy when in public place or catching public transport for which I take etizolam to ease. But this has resulted into constant dependency. Even after having medicine I am unable to go out or not confident enough to be in group and always feel like sleep at home as if I am sick. Current situation I am going through is. Constant Heart palpitations (ECG result Tachycardia) with left shoulder pain which comes and goes. Neck and head pain in left side from when i got my first panic attack. Uneasiness and tiredness. Constant gastro followed by bad headache to anxiety attack Lack of energy even after sleeping for 12 hours. Please suggest if I need to change treatment. Regards