I would definitely go. The server that my T's office used to use often ate e-mails. Like I would ask my T (or marriage counselor) if they'd read my e-mail, and they'd check the account and said it wasn't there. And that sometimes e-mails they sent never got to clients. (My T confirmed this--it wasn't just me!) Thankfully, about 6 months ago, they upgraded to have a server through gmail, and that problem seems to have gone away. So it could be a problem with his e-mail. Or maybe he has tried sending the worksheet, and it didn't go through but he didn't realize it. Definitely talk about it at the appointment though!