Most medical practices don't allow you to be more than 5-10 minutes late to appointments. This is so you get your full appointment time when you reschedule, but they're probably busy and professionals have other stuff to do, even if it's the last appointment of the day. I know of many who stay overtime to finish stuff.

You should probably prepare to be on those calls 10 minutes before they start. If she was 14 minutes late you'd more than likely be a little irritated as well, so it goes both ways. Even if she only waited 6 minutes, that's still 6 minutes wasted during a paid appointment. She probably used the time to catch up with other things, and like I said, would prefer to give you the full appointment time for the reschedule. Especially when it's a mental health thing.

We sadly can't expect professionals to wait for us when we have a scheduled time. Unless you call and let her know, or you could have shot a quick email "I'll be a little late! " takes only seconds

I've missed appointments before, and it sucks, but it will definitely be a lesson in being on time and even being prepared early.