sleepless nights

Krystal
Since my daughter turned 9 months I feel like her sleep pattern at night is off. During the day she takes great naps and usually goes to bed for 8. I even gave her another ounce of milk in her last bottle thinking maybe that's why she's waking up. Seems to be between the same times she wakes up every night just very strange. She has always slept through the night since she was weeks old. Now she wakes up between 2-3 am just fussing, I will make her a bottle but then a few nights out of the week she won't go back to sleep she wants to stay up. Anyone else going through this?