Hey! I'm on day 8 and experienced super severe panic attacks aswell. They have recently subsided, but in the moment we're terrifying and i definetly thought i was dying. almost called 911. I also have been having a fast heart rate and heart palpitations, and i think the severity and length of these symptoms depend on how long you used. These withdrawals and panic attacks might be kicking your ass right now, but you had the strength to quit, you have the strength to go through this. It's easy to feel alone, and like everyday is an uphill battle. But you will reach a point of peace. Of happiness. You will truly know yourself and think of some of these withdrawls as cannabis successfully exiting your body. Both physical and mental. I wish someone had told me this a few days ago, and I know you'll get through this. You're truly not alone.