My four and half month baby is sleeping for a long time at night without peeing. She use to have both formula milk and breast milk. Suddenly three days before she stopped drinking formula milk. And is not accepting bottle. From yesterday she is not peeing all through the night still she wakes up. And all through the she is peeing normal. And to she sleeping a bit longer than usual. She use to wake up by 9-9.30. Today she is sleeping longer.