Hello sepper37 and welocome to NeuroTalk.
Have you brought this current problem up with her Therapist? If not please do so. Your daughter might speak more freely with her Therapist than with you, her parent.
Transitioning to High School can be very difficult for the a majority of Freshman. It is such a change from the lower grades and can cause anxiety, depression, fear and a very uncomfortable feeling about attending school.
Just a FYI in case you are unaware:
Many of the medications that are used to treat Mental Health issues (anxiety, depression, ect) come with warnings. These medications for some children and adult can cause suicidal thoughts. If you feel your daughter is getting worse it would be a good idea to have her seen by her Psychiatrist or whom ever prescribed the Prozac, asap.
Information about Prozac: