Well, sure, you can tell whoever you want. But you can't take it back, so really think hard to see if they're the kind of people who will understand. If they don't, they'll look at you differently forever. And be prepared to hear a lot of "Just get over it/ snap out of it/ it's all in your head" BS.
Maybe slyly bring it up in conversation to see what they think, before outright saying you actually have SA yourself.
Apart from that, if you think it'll help people understand you better, then it's probably a good idea. And welcome to the forum. And to clarity.