They will often sleep a bit more after needles. Either that or be really unsettled. Just another thing that us mums have to try and cater to.
Did you end up expressing the normal feed? If he does the same thing again today tonight, migth be worthwhile expressing the feed to keep control of your supply.
As long as the wet nappies keep coming its ok to snack for a day or two. Offer whenever he seemsa bit grizzly.