(((((((((((((((((((Zooropa)))))))))))))))))))))))))

It IS a big deal, and you are NOT over-reacting.

And I've been thinking about this and wondering why your sister did what she did. I think if my sister told me something like that, I would be shocked, and maybe scared and unsafe, and not knowing what to do - almost like I had to do something to help? Or show I cared?
There's no question that she messed up bigtime. But I'm just wondering if she did it out of a place of caring about you, rather than trying to hurt you or make things worse for you.

How did your sister react when you told her?

I'm glad you had the med change and that it seems to be helping. I think you should give yourself credit too, for using good coping skills and asking for support.