You have lots of good advice already. Given that it is now two weeks out, I do wonder if something happened as Indigo suggests.
In your shoes, I would start with calls, rather than e-mails, so you get the tone of what's happening. I would probably call the school first, let them know you have a report in progress (with any luck, they already know why) and ask about timing for next school year discussions, etc. Then I would also call the psych's office, say you got the message and ask how sure they are about the new report date (maybe ask if everything is okay)... then mention that you are worried due to needing to make any adjustments with the school. Or something to that effect. Generally, I like to hear what people say before I put things in writing in situations like this... ymmv.
