I don't really watch horror so I've got a low tolerance, but It Follows scared me and left me spooked. Like being constantly stalked by that snail but it's a sex snail that could be anyone freeeky deeky stuff.

Apart from that lol it's The Grudge, USA remake. But I didn't actually watch all of it cos I had to leave the cinema (uhh it was too scary for my younger bro) so after one my friends told me that apparently there's a scene where there's croaking ghost in a swivel chair and they turn it around and there's a jump scare, and my house had a swivel chair, and it would often be facing back towards me when I entered the back room and for a month I couldn't look into that room if the lights were off, I'd just avoid it so indirectly it's The Grudge.