Why is my baby suddenly waking ?

she could be having a growth spurt which would explain her wanting a bottle. or she could be teething. i found that teething granules worked for my son if he woke in the night they worked almost instantly and he went back to sleep. they are herbal so no worries there, has she gone through any milestone i.e sitting standing etcc. i found that this disrupted my kids sleep for some reason. not sure why .