Don't worry, your baby's sleep cycle will stabilize soon, even before he or she is sleeping through the night. Pro-tip: go to bed when your baby does. Mine (5 months) tends to sleep from 10 to 6, waking up around 2 to feed. If I followed my pre-baby sleep schedule (1 to 8), I'd get up after just an hour of sleep to feed her, then get another 3 hours until she woke up again. Bad news bears. But if I go to sleep when she does, and wake up when she does, I'm pretty well-rested even with the feeding in the middle. Also: you can use feedings to get a bit of work done (I save stuff I can do in 45 min to 1 hr for night). Just learn to feed the baby while typing.