Under my current care I'm seeing my therapist and pdoc at the same mental health center so they have access to each other's notes and can talk to each other. It's also required that I sign paperwork for my pdoc and GP to have access to each other's notes, etc. Which has turned out really helpful in terms of looking at blood work - I had some done by my pdoc, then went to see the GP, and there was a question about something so the GP just went into the system and double checked.

I don't know if it's required, but previously I've always signed paperwork and consented that my pdoc and therapist could talk to each other and I also made sure to include the GP. It made sense to me that occasionally they might have to talk to each other or get access to notes, but I don't think that they ever did.

That being said, if you don't feel comfortable with your current therapist then maybe you should try and find another one.