15 mth old sleep problems waking every othr nite at 12:40am and not settling until 4am i end up sleeping in the spare bed with her keeping all the lights of from the moment she wakes. She only has an hours sleep during the day. I am a stay at home mum just working 2 nites a week when she is with her dad and she does the same. This has been going on for about a month, before this she was bliss with no problems and there has not been a change in her routine. Any ideas cause im at the end of my tether and 16 weeks pregnant. With many thanks.