I suggest speaking to your nurse about you seeing a T too.
I have also sometimes felt like there's just so much going on in my head, that I don't even get to scrape the tip of the iceberg when I see my pdoc (Also does a bit of therapy). Sometimes I have so much to say, but I just bottle it up, and by the time I get to my car I'm all emotional.
Is it possible that your nurse is someone you really trust and feel safe around, and you don't get much of it in other places in your life? So you cried when you realised the appointment was over, and sort of felt a sense of abandonment? Not sure if that made sense, but I tried.