When does the anxiety go away?

I passed my class and all the exams and practicals with flying colors. I know I know my stuff. But talking with patients and family and comforting them gives me so much anxiety. But I want to do this so badly and I want to be good, and I think that's a part of why I'm so anxious. I've always been a shy introvert. And I know with this job you simply can NOT be shy with your patients. I've read a lot of posts saying all this comes with time and practice. But how much? Because I'm really over myself stumbling my words and having a shakey voice.

I was so anxious before work yesterday that I had a mini breakdown. I'm in the field training process now, and I'm in instructional. So I'm lead EMT on the calls. When I walk into the house, I immediately forget all my questions and freeze up even though I KNOW what to say and ask. I even review my questions on the way to the call. I genuinely feel terrified walking into someone's house. How do you get better at that?

Any other advice for a new EMT going through this process?