Check out the book by Jodi Mindel. It is called "Sleeping Through the Night-How babies,toddlers and their parents can get a good night's sleep"(or something like that) She is a sleep doctor...an M.D. I read the book before having kids. It is a sleep Bible!!
All three of my kids were sleeping through the night between 8-10 weeks old...yes I typed weeks. I nursed them each for over a year and did not have them sleeping with us or in our room. They became deep night time sleepers and great daytime nappers.
I am so grateful that a girlfriend of mine gave me the book before I had kids. Sleep is so important to a M....and for kids.
The book explains so much about sleep...it also has great info for parents of toddlers and preschoolers. Lots of troubleshooting helps. But also teaches you how to teach your baby to soothe themself to sleep. It is NOT a let your baby cry til it passes out due to exhaustion.
Good luck! Now mine are 14,11 and 7. They are still great sleepers. On weekends they get themselves up in the morning, make their own breakfast and get ready on their own all without waking us up. Your day is coming too M.!!