I've never missed without calling first, but I'm pretty sure my T and pdoc would not call to check. As for his not responding, I know I don't check email throughout the day so I never use it for anything urgent. I don't remember if you said in your OP, but did you ask a question in the email? Some people have a habit of not answering emails or texts that are informational and not asking a direct question. I've annoyed friends before for making this mistake. Plus you called so I'm sure your T is not mad, it happens to them all the time.