I don't have much advice, I just wanted to let you know that we went through this exact same problem, and it does work itself out. I just stuck to 3 hour feedings, even if that meant E A S A E for awhile, and the 45 min naps worked themselves out at around 4 months when we went to a four hour feedings. You want your lo to take full feedings, so feeding him at 2.5 hours if he's not really hungry will not help him do that. I hope someone else has something more practical for you! hang in there! My dd is now almost 6 months and is on a beautiful 4 hour routine, with 2 hours awake time and 2 hour naps! When she was 3 months old i was pulling my hair out, too! Good luck with returning to work!