A question about panic attacks and the way you feel afterwards?

What are normal symptoms after a panic attack? I've done cognitive behaviour treatment and last time I exposed myself for a panic attack situation I calmed myself down, I guess I didn't want to get to the top. And when I came home it was the worst feeling I'v ever felt in my entire life! When I went to bed I had an intense feeling of wanting to run away somewhere, I wanted to escape from myself and I started to think about the universe and where to go, like jumping out somewhere. I really did not know. Just this whole panic. Horrible! My thoughts were moving in real high speed and whever I heard an ambulance or something, I was about to freak out. An now I've been told the only way to get rid of panic attacks is to face them. But I'm afraid next time I expose myself for a panicking situation and I stay in the situation to wait for the panic attack to fall by itself, I'm afraid I might go insane afterwards? I wonder what are some typical symptoms after having a panic attack and If anyone has ever experience this, how did you feel? I know panic attacks wont harm you, but I'm afraid my thinking might cause problems for me, and I might get this horrible feeling of wanting to run away again. :( I know these thoughts are common during a traumatic situatuon, because that basically menas my body is all sped up ready to fly. But I'm afraid next time I get a panic attack, my thoughts will start to rush and I'll go insane?