My 10 week old DD had a terrible nights sleep last night - waking every 45 minutes and now I'm starting to worry about her sleeping patterns. Up until 3 days ago she was sleeping OK though so this could be a separate issue. I am waking her from her lunch nap after 2 1/2 hours but she is so grumpy and wants to just fall back asleep but at this rate I am going way over the allotted 5-6 hours of daytime sleep....also what time should they be going to sleep at this age! She is formula fed and wont go longer than 3 hours in the day? She goes about 4 hours in the night. Any advice greatly appreciated...