I understand what you’re going through. I am the kind of person that needs to feel comfortable or educated about what is going on with my body. I did Google both of them and I do understand why you are questioning in a little anxious about your upcoming appointment. I would be too.
Go to Google/Scholar And do some homework. This is a great above just normal Google. Do your own research so you know what to expect and ask questions. Sometimes the simplest question can lead to better treatment and understanding.
I wish you the very best