I would wait a few days to see if it sorts itself out, if it doesn't, I think you are goign to have to work hard to get your lo back on track. And it likely won't be very easy. You will have to break the nurse to sleep association and you will have to stretch out time between feeds.
I would start, when you are ready, but stretching the feeds. This can be done by someone else holding your lo while awake. (That's what worked for me). Plus use any other method you can to stretch him... encouraging full naps will help too.
You will have to use pat/shh to break the nurse to sleep assocation, or whatever method has worked for you in the past. Hopefully your lo will cooperate and make it easy on everyone.