I am pretty sure you would have had to have signed a waiver at the time of your initial therapy session authorizing the exchange of information and communication between your psychologist and psychiatrist. My assumption is supported by the fact your therapist knows who your psychiatrist is.

Secondly, these individuals work together as a team looking after your mental healthcare.

Finally, it is your therapist's obligation to take swift action when you endanger yourself. She is not going behind your back.

How can you have faith in her? I would take these actions as her demonstrating you can. She is acting with your best interests in mind. That is enough for me to have faith in my own mental healthcare team.