Uh oh! Sounds like you've gained more than just a new baby brother.
Could you take a clear, fairly close-up picture of your blanket and post it here? Maybe that will help us track down this pattern for you. Directions for how to post a photo are here: http://www.knittinghelp.com/forum/sh...ad.php?t=80610
Alternatively, maybe you could give us the pattern you're currently knitting (at least what you remember of it).