I'm sorry she shared something with you that wasn't really helpful or healing for you.

I've personally found that some disclosure from my T's helps me, because otherwise I start to idealize them as these perfect beings who never make mistakes or have never dealt with anything like what I'm going through. They've never shared something super super personal (like abuse or trauma) with me, but enough to where I realize they're human too and so I don't feel quite so crazy. Plus, when they do make mistakes or forget something, I'm more understanding instead of being incredibly hurt (in an overreacting way) like I used to get.