Pax, don't forget too that I'm sure your lawyer sent discovery and he has an obligation to respond in advance and provide the materials he intends to rely on. That should give you some time to confirm the authenticity, since we know your ex-H is not above fabrication.
It's going to be ok. Try not to borrow trouble. Did you see DnJ's advice about not making up his mind about what he will find at a call until he gets there? It wasn't too far back and it was such a great antidote to those of us who have become hyper-vigilant from the trauma we have suffered.