Sorry for the late reply gb18, only just seen your post. That's horrible for you. Is something else going on like teething? If wu was at 7, that's still a reasonable A. I wouldn't have expected a 30mins nap unless something was disturbing him like teeth.
It's too late now I suppose, but I would've gone for a VEBT of 5.45-6pm so he can hopefully catch up on sleep then you can start again tomorrow. What did you do in the end?
Mine doesn't respond to apop either.. btdt! I just short for an EBT and deal with any consequences (if any) the next day. She does usually tack on the sleep missed, does yours?
((Hugs))