Even if didn't exactly the same, I can, somehow, relate to what you said.
The Conjuring was one of the few movies that made me feel something, that surprised and made me feel that it was indeed a horror movie, and I was ecstatic about it too.
But at the same time, the movie somehow reminded me about that time when I had PTSD (I can't say if I "still have" PTSD, I don't know how that works. In these years I have less nightmares about it and zero flashbacks), so I don't know if I can say it wasn't trauma related, but I didn't feel it like it (if that makes any sense).
I can't say if my emotions why my emotions were stinted, but, yes, I was feeling like that a lot lately and the movie made me feel so f*ckin alive that I couldn't stop smiling and feeling like my energies were at the max. lol
I didn't expect to read about someone who experienced a thing like that too! I'm really considering watching again the movie for the rush of adrenaline I could get thanks to it.