I feel pain from scares?

So I have this habit of checking out spooky media because story wise, I think it's cool. But of course that means jumpscares sometimes. I've always hated them but I've had mostly normal responses. Flinching, racing heart, etc.
Well lately, when jumpscares occur, sometimes I flinch but it's very light, and instead of a racing heart I get a light pain. The pain is a sharp and fast pain, like being pricked with a needle. It can be near my heart or lung normally and sometimes it's in a random spot, like my hand or foot. Any ideas of what's up with that?