what's wrong with my baby?

So, since birth, DD has never slept thru the night. She would wake up every 3/4 hours at night to feed and go back to sleep.. up until a couple of weeks ago where she would sleep through her usual 3/4 hours, and then after that first cycle, it's every single hour! We co-sleep, so I just soothe her back to sleep with a sip of the bottle (which I keep in a cooler by me), her pacifier, or just simply shushing and patting her back to sleep. I know asking her to sleep through the night without a peep is too far-fetched at this point, but I don't want to be waking up every single hour either by crying or kicking off the blanket and rubbing her face madly! I thought it was because she's reached a new milestone (turning over), but it's been over a week since she's accomplished that feat. She has no teeth yet either, so does that rule out teething? She's not sick or anything. Overall, she's a happy little baby.

What do you suppose is going on?

DD is 7.5m

Re: what's wrong with my baby?

I never co-slept but maybe it's time to move her into a crib so you don't hear every peep and she can learn to fall back to sleep on her own?
Also, teething is painful before the tooth breaks thru so that could be it too.