Yep. I've had it occasionally off and on for 20 years, but this past year has been the worst ever.
I have Xanax for it. Until it kicks in, I usually tell my husband I think I'm dying, and then hug him and my pillow. Just sort of hold on for dear life...gasping for air.

I also have PTSD and I've read the brain tries to process trauma while we sleep, and sometimes we wake up in the middle of it. I don't know if that's true.

If you stumble onto a cure, please let me know. Take care.