My dd (6 months) was doing quite well (well we thought so) and only waking once or twice a night... the last two nights we have been up almost every hour with her and she has now decided at 5.30am that was it and she was awake and wnats to play! What has gone wrong? she is currently sittingin her baby walker laughing and giggling and generally making far too much noise for me at this time of day!!! HELP APPRECIATED!