How to get rid of panic attacks?

I've been having severe panic attacks since I was about 11 and I'm 16 now. When they first came, it would happen on a regular basis, and would last several hours. At times, I would end up in the emergency room because of it. My mom took me to therapy and put me on medication to control it, and it subsided for a while. But recently they started to come back, and they're getting pretty bad. Almost to the point where I don't wanna leave me house, because I'm scared I'll panic in public. I've tried to relax and things like that, but it's not helping. Is there anything I can do or take to help control them? Because I really don't wanna go to therapy or take pills anymore. I just want them to stop. Please and thank you.