ptsd makes sleep impossible

So I've been struggling with sleep lately, and it's all because of this damn PTSD. Every time I close my eyes, it's like my brain decides it's showtime for flashbacks. It's exhausting. I can go days without a decent night's rest. I'll be in bed, physically tired, but my mind is a whole different story. The second I finally get comfortable, bam, stupid memories flood back in vivid technicolor. It's annoying as hell.

I've tried the usual stuff like calming teas and bedtime routines, but honestly, they just feel like bandaids on a bullet wound. Anyone else going through this? What helps you actually close your eyes without feeling like you're about to watch a horror movie every night?