It always takes a few days for your boobs to adjust to a new pattern.

I'd say just enjoy the long break and trust he will start waking and build your supply back up if he needs (remember babies have growth spurts so it's normal for him to start waking again).

On a side note, my 13month still feeds through the night and has never gone beyond 5 hours without a feed. You boobs must get pretty big by morning!!!!