B.P.
Sleeping for longer periods of time will come with age but this is what worked for me. We got my son in a crib at 4 months and then he has been sleeping through the night (except when ill or teething) since 4 1/2 months. He is 22 months now. Get an ocean wonders aquarium the he can turn on himself if he needs soothing. I would put it on softly as I was nursing my son to sleep and also when I would put him in the crib. When he would get up at night, he could just push the button and it would make the light and music come on...it was a lifesaver. Also, if he doesn't have a lovie yet, he needs one since it really helps develope self soothing behavior. Anytime my son woke at night and cried for more than 1 minute I would go to him. Often a lot sooner if the cry was distressing. SOmetimes babies at that age "fake cry"...I would give it a minute or 2 before you go in. Also, nurse in his room. I know it's tough, but use the same blanket and anything else you can use every time. Keep attending to him and then lay him back down to sleep...when he feels secure, he will realize that crying is more trouble than its worth. Good luck!