Going backwards

It was my thing, my proud mamma moment, my smugness.

Ryan and toilet training.  Just before he turned 3 we decided to ditch the nappies as he was showing interest in the toilet and zoom, it was pretty much done.  Took approx 3 days, just a couple of accidents and then he got it.  After a month or so, it occurred to me that he was dry most nights too, so we ditched the night nappy too.  He never required to be reminded (yes smug), he woke himself up and then woke me up to go to the toilet over night.  It was great.  A little annoying as he woke up several times a night to go to the toilet, but I thought well he's waking up so don't complain - I may have complained a couple of times.

Then about 10 days ago.  He was drenched in the morning.
9 days ago.  Drenched at midnight.
8 days ago.  Drenched at midnight and again in the morning.
7 days ago.  Drenched at some point through the night.
6 days ago.  Purchased some pullups and explained they were undies and to wake up and go to the toilet.  Drenched - including the sheet - in the morning.
5 days ago.  Pull ups - wet.
4 days ago.  OK enough is enough, I'll wake him.  Midnight, fully wet pull up, 5am dry.
3 days ago.  Missed the midnight and drenched including sheet in the morning.
2 days ago.  Woke at midnight - wet pull up, tossed and turned in bed with me, but did not wet again until morning.
Yesterday.    Missed getting him up at midnight, wet pull up at 4.45am and then went to the loo and then DID NOT GO BACK TO SLEEP.

Get the picture?? Ok I was pretty clear about it.

Why would this happen?  I've been a little/a lot cranky lately.  The excitement of our holiday?  But he was SO good, and now is SO bad.  I've limited his milk tonight.  Will get him up as I go to bed, hopefully he'll go straight back to sleep.  And then wake him again at 4-5am and again please go back to sleep.  Its just so odd.  suggestions?  Anyone??