I've been suffering from panic attacks for a few years, but not very often and they were bearable. But two days ago, something took a turn for the worse: I was sitting on my couch playing on my phone, and I don't recal having any physical stressors. All of a sudden I got extremely cold and I got goosebumps all over my body. My hands and feet started to go numb and they had that "pins and needles feeling". My stomach felt like it was filled with butterflies and I had an unbelievable adrenaline rush, and then I lost control of my emotions and started sobbing. Soon after it began I started to shake, and the shaking turned into convulsing. It was so intense that I thought I may be having a seizure. After 45 minutes of this (yes, FORTY FIVE MINUTES) I called someone to drive me to the emergency room. They made me wait in line, and my attack was over before I was even called in. A few hours later I had another one which was shorter, but the convulsions were more violent. The after effects were horrible and I'm still in pain a few days later; this was at least 10x worse than any panic attack I've ever had before.