3 month sleep regression?

Is anyone else dealing with an interrupted baby sleep pattern?  My little guy was doing from 7pm-3am and then going back down until 5:30-6am (when I get up for work) but in the past couple of weeks he has started waking up more and more, now he sleeps until 12am-1am and then is up almost every hour to eat!  Nothing will console him.  He falls asleep while I am nursing him at night during each wake up.  Nothing has changed in our routine!  I am at a loss and I need sleeeeeep