I don't know if I should even respond, you've had a lot of responses already, but I just wanted to say something a little different. It's the way I have taken with my 2 that works for me, which by the way, really the best solution for your problem is to do what works best for both you and your baby. My little girl did the exact same thing as yours. She started sleeping from 8 to 8 at 6 weeks old, it was beautiful, and I didn't see anything wrong with it at all. She didn't mind it, so neither did I. Then at 4 1/2 months, surprise she started waking up again in the middle of the night. At first I nursed her when she woke up and started her on solid foods the next day, thinking that that must be the problem. She just started waking up more, when she saw I would get up with her. So what we did, is we made a rule (I was working at the time, and my husband was staying at home, so getting up all the time was not the solution). Our rule is that I would only nurse her between 4-6, once. Other than that my husband would get up and get her back to sleep, (not by taking her out of bed) giving her her pacifier, ect. That worked for us, and we have done that with our little boy. Now I'm at home, and could get up that often technically but I still don't think it is necessary to nurse them every 2 hours once they are past the newborn stage. But you know, every baby is different and so is every mother. Just find out what works best for you. Hope that helps.