Aw, sending you hugs..you aren't a waste of space or time at all. You do matter!
Maybe you could call her tomorrow and tell her you want to address x,y,z next week. That way she'll address it and you don't have to rely on yourself to bring it up.

I'm sorry about what happened to you. I don't know what happened, but it's never the victim's fault.

Have you considered going to a recovery group? Just a thought.
And it's okay to cry, yell, etc in therapy...just do it...or do it at home - where ever and whenever - you might be surprised at how good it can feel to get it out. I useed to have a good friend that cried and got it all out in the shower b/c she didn't want people to see her upset..she said it was time for a good "shower cry"...

Be patient with yourself. It's a good step that you are talking to someone. Hang in there hun.