Trigger warning, but I'm trying to keep this as mild as possible.
At 17, I was sexually abused by my boyfriend. I never realized how bad it was until later...and now I want to talk to my sister about what happened to me, so that she can be prepared for similar situations (she's 15.) Thinking about it has been making me relive it, and I've started having really bad nightmares. I've never told anybody about it and I really want to talk, but I don't know if that's an acceptable topic for these forums.