My kids never did that, but every babe is different. I wouldn't have any expectations as such so you aren't disappointed if he doesn't automatically drop the feed, and also remembering phases happen and it could all go down the pipes for a while anyway. I found my babes fed heaps more just before they showed signs of illness, before a growth spurt and of course when they felt like they needed more comfort. I think in tiredness and exhaustion routines tempt the best of us but remember this too will pass. I had the worst sleepers, but now, at 6 and 3.5 you have to drag them out of bed or they will just keep sleeping! I think there is so much fuss over getting them into bed when you have to spend the rest of your life getting them out of bed :P

To help you cope in the meantime, find some good support so you can rest too, sleep when baby sleeps and forget the housework and co-sleep as much as you can, so babe has access to the boob and you can keep sleeping.