I agree with isaac's mom. Also, I remember my dd would not be hungry in the morning after a night filled with nursings :lol: . She would wake up at 7AM and not nurse till noon :shock: . I was very concerned about this but she was not starving, actually she was well gaining weight... from night feeds.
With us, it happened around 6 months and it lasted maybe 2 weeks maximum, it got better soon after that.
I also don't recommend offering any solids including cereal before 6 months, this might actually interfere with your lo's milk intake and at this point, it's the milk she needs.