I'm pissed that my ex told his family/friends about my suicide attempt
Why would you be angry at someone who tried to help you?
Oh, you mean I wasted my anger on that?
That's exactly what I mean.  A suicide attempt is something serious that those who care about you deserve to know about.  You shouldn't be upset with her for trying to help you!
Oh thanks for talking to me, now I see a different side to it I think.
Yes, anger is not always a good reaction to just anything. You need to be open and listen to others to know the real reasons before jumping to conclusions that others are only out to get you.