Hey Byngo...I really do feel for you. Tiredness is the worst. Some mothers would probably not agree with me but from previous experience (I have 3 children)at around 5 to 6 months, especially bigger babies, milk just isn't enough. I would introduce some baby rice. Only a small amount, 1 or 2 teaspoons around tea time. This should hopefully fill her up till her bedtime bottle. Make sure she is in a happy mood when you try to introduce it as she may choke if she's crying etc. I hope this helps & I hope you get some sleep soon. Debstar