DD's routine went down the drain at 6mo. She used to sleep 7pm to 7am with 3 feeds overnight, and had two day naps.. then at about 6.5 months everything went sour. Her night wakings were between 3 and 6 times and often she would be wide awake at 2am, and also wake up for the day earlier at around 6am.
Still struggling with this at 7mo, but I think it's coz we haven't got the hang of solids yet and she's just plain hungry and can't settle. Sorry not much help, but at least you are not the only one!`