Sleep problems....

firechick1

My DD (9 wks old) sttn for 2 weeks, it started with 5 & 6 hours and progressed upto 8 - 10 hours per night.  Since the 23rd she has started waking up every 3 hours and fights sleep something terrible.  It can take up to an hour or more to get her to sleep now.  I figured her routine was messed up because of the holidays, but things are still not getting better.  I go back to work on Monday and am not looking forward to being up all night and at work all day. 

I have been sticking to her regular routine, but it does not seem to work anymore.  Does anyone have any ideas on what might help to get her back into sleeping again???