My almost 12mo had a very busy day at a first birthday party. She napped 2.30-3.40 and woke up herself. She was clearly still tired and grizzly for the rest of the evening. We bathed her at 6 and she went into her cot at 6.30 after a lot of grizzling but she was calm when she was put in bed. Since then she has screamed and screamed in her cot. I have taken her out once for a cuddle, and gave her calpol about 40 mins ago incase it is her teeth and checked her nappy. About 20 mins ago I went in and reassured her and stayed with her for a few mins. She calmed but just sat up, not trying to sleep. She is now still going crazy in her cot and I don't know what to do. My DP says just leave her, there is nothing wrong other than she is tired. I am not adverse to leaving her to grizzle but she's not grizzling she's really screaming. I am getting quite stressed as I don't know what to do for the best. help!