your situation is very common and there are many possibilities for why your baby is waking up now: 1) she could be teething. even though teeth don't break through the surface of the gums until 6 to 8 months on average they can still be moving upward and causing pain. 2) she could be having a growth spurt. this might explain why the feeding helps. 3) she is more alert and aware during the periods of light sleep at night. also as she reaches the stage of separation anxiety (usually around 8 or 9 months but could be sooner) so may be looking for you. 4) she is waking up out of habit. if you feed her to sleep at the beginning of the night she may need to feed again to fall back asleep in the middle of the night. 5) she could be hot cold in pain etc. if this behavior keeps going i encourage you to see your pediatrician to make sure your baby doesn't have an ear infection reflux or other illness. these are just some of the common causes of night-waking that i see in my practice. .
why has my 5 month old gone from sleeping through the night to waking up crying? we have to feed her to help her sleep.