Apologies in advance for the length of this post.
DS1 is now ten days old and my first baby. I'm currently breastfeeding + cupfeeding and would really appreciate some gentle advice on how to wind down the cupfeeding.
In the hospital, DS wouldn't latch on properly. Dr Spock has the perfect description for him - the "irritable nurser" ("Other babies, hungrier, more wide awake or more assertive, react with irritation when they find they can't get enough milk. They jerk their heads away from the breast and yell, try again, become mad again."). When he finally latched on properly, he would promptly fall asleep and no amount of stimulation would wake him up. The lactation consultant said she'd rarely seen a baby so nervous / anxious about latching on.
After two and a half days, he'd lost too much weight so the midwives started feeding him formula through a syringe. By day three, a nightshift midwife put me on an expressing machine every three hours and DS on formula (although after talking to the hospital consultant we fed this using a cup rather than a bottle). This worked for us - my poor sore nipples got a rest period, and DS became much calmer as he gradually put on weight (though the smells he produced from the formula were spectacular).
The milk came in around day 4 to 5 and I was still in hospital. On our last day, day 6, after lots of skin to skin, we finally got him to latch properly, though the lactation consultant told me the milk needed to flow a little stronger for him to have the patience to stay at the breast.
Since we came home (equipped with a hospital grade expressing machine), my milk supply has gradually increased until I now have more milk than DS will drink at the breast - we only had to make formula once or twice. DS has also noticeably calmed down and can now be put to the breast without a giant panic.
My problem is that the hospital gave me a feeding schedule which assumes I'm feeding him expressed milk or formula 
and I was so focussed on getting him to feed from the breast / producing enough milk that now that this has all happened, I'm not sure what to do 
When being fed only from the cup, DS will drink around 80mls at the moment and then sleep like a log for 4 hours (5 at night), occasionally waking for the odd bit of indigestion. There is no regular pattern to the breastfeed (since he's really only consistently managed since yesterday), but he will feed on one breast for at least an hour (including one or two burpings to keep him awake), and seems to be still getting milk at the end of it - I use a nipple shield and can see the milk in it, plus can hear him still sucking and swallowing and the latch does not usually hurt. This afternoon, he fed for two hours 
and was still hungry at the end and wouldn't sleep. I hadn't eaten properly all day so I gave up and gave him 40mls on the cup so I could grab lunch and he's again sleeping like a log. On the one or two occasions I've managed to only BF him, he still sleeps for 3-4 hours, ie he is not really waking of his own accord to feed.
It feels to me that DS needs to acclimatise from getting his feeds in one huge slug from a cup over a ten minute period to the longer BFing, and also to get used to not being super-full.
I'd really appreciate any advice on whether / how often I should be waking him up to feed, and how long I should expect a feed to take in this transition period (long-term, I'd be scared of two hour feeds...). Also, if hubby could give the occasional cup feed or bottle feed to give me a break without doing any permanent damage.
Please be gentle with me, I am a giant bag of hormones at present.... and apologies again for the humongous post.