Anyone else having problems with there 5 month old not sleeping at night?? My daughter goes to bed around 6:30 and sleeps for 3-4 hrs and then wakes up every 1-2 hrs! She has been doing this for 3 weeks now and I am completely exhausted and have other children that I can't tend to properly because of being SO tired. Any advice as to what is going on or something I can try to help her sleep longer?