4 MO slept pretty well after a dream feed until about 5.30/6am. The whole of this week she has been up between 3.30-4.30 - NOT seeming terribly distressed or hungry, just restless. Have been soothing her with a dummy back to sleep & it works but I'm then repeating the process every half an hour from then on as she wakes up. Any idea why this is & what I could do to stop it happening?