The Question and Answer section for Thirteen Reasons Why is a great resource to ask questions, find answers, and discuss the novel.
Hannah knows she is in trouble. She is having suicidal thoughts and reaches out to her councilor for help. This reveals that Hannah does not want to die. She is looking for a way out.
This isn't stated in the chapter but it is implied that Mr. Porter, the school councilor, plays a part in her suicide.
I think Hannah is not clear about being sexually assaulted. She claims she was not but she clearly feels she was.