Yeah, I think I know what you're saying. I looked up the definition of panic attack to be sure.
Gremlins (1984) used to really freak me out when I was about 8 years old. When I closed my eyes in the shower to shampoo my hair, I imagined that when I opened them, a gremlin would rip back the curtain and attack me. I was paranoid that everywhere, just beyond where I could see, there was a huge mass of murderous little creatures waiting for the moment when I wasn't watching.
I didn't ask my parents for help or my friends. What sort of worked was to make the gremlins silly. I imagined them being my friends and following me around the house.
I watched "The Descent" (2005) in my late twenties and it was exciting at first to feel that old terror come back to me. Then I had to turn off the tv and goto sleep. And it wasn't fun anymore.
I get this sometimes just spinning out of control of imagining terrors. I find it useful to get angry. And if I can, utter some sort of defiance. I know the terrifying monsters are not in the shadows but I don't really feel like I'm accepting that fact until I say, out loud, "Bring it on!"