Does he like to be swaddled?  That helped my dd.   I'd lay her swaddle blanket on her floor and started wrapping her up and she knew it was time for sleep.

I would also keep working on the nuk.  My dd didn't start taking it until about 4 months, so there is hope, if you'd like him to take it.   She ended up being my best sleeper. 

My daughter had almost identical sleeping problems at 4 months and I know other Moms that reported the same problems at 4 months.  I think there is a lot going on developmentally at that time and this throws off their sleep.    For me, it lasted about 2 - 3 weeks and then she was back to normal.  I would recommend doing pretty much whatever it takes to get him to sleep and not worry too much about bad habits at least for a couple of weeks. (I do know a lot of Moms might disagree though - this is just what worked for me.)   I personally don't think crying it out really works at this age and I agree it just feels wrong.  Some things that worked for me were the swing, the bouncy seat and pushing her in the stroller (even just in the living room.) 

Also, my daughter would NEVER sleep in her crib for naps (though she slept there at night.)  But right around 5 months she started sleeping in the crib and still does most of the time. 

You might also try reading the book "Healthy Sleep Habit, Happy Child".  I thought it was helpful.

Hang in there and take care of yourself! 

JadeNature

Is he teething? I'm having the same problem with my 6-month-old, and he wont take the pacifier either. I try to offer him other things to chew on. He seems to like chewing on cloth things.

"Make sure to secure your own oxygen mask before attempting to help others."---The Airlines

At four months, I think its still natural for your child to wake up to nurse that often.  Have you talked with your pediatrician or a lactation nurse?

Traci, Proud mommy of Philip

Today is the tomorrow you worried about yesterday....

Do you have a family bed?  It sounds as if he's most comfortable and secure when he's snuggled safe and sound right next to you.  It's soothing for both of you, and you soon will be able to sleep through nursing sessions; baby will root & latch, and mama goes back to sleep.  It's loving, natural, and baby will sleep so much better because of it!  I highly suggest co-sleeping.  It's glorious.

SANDRA
Non-vaxing, co-sleeping, babywearing, gentle disciplining, free-ranging, loving attachment mama to Brett (16), Justus (11), Autumn (4), & Ayla (1)
http://www.photographybysandra.com

 I don't think that at 4 months old you should be letting a baby cry it out. At four months, crying is really their only way of telling you that they need something. I know there are some 4 month olds that sleep through the night, but if you are BF, then it's less likely at that age. It seems like from what you've said he sleeps better during the day. Try keeping him up more and allowing him more time to be active and awake with tummy time or other activities you can do with him. He may have his days and nights mixed up...thinking he should sleep during the day and then wants to be up at night. 

 Also, it's very common for children learning something new, like crawling, rolling over, walking, pulling up, sitting up, ect., to regress in other areas like sleeping. 

http://www.flickr.com/photos/jessmillerphotography/

 He might also be over-tired. You might try laying him down to sleep when the FIRST signs show that he is tired. Make sure when you put him down, he is well fed and dry diaper. 

My son started that phase around 4 months, where he wouldn't go to sleep because he was so over-tired.... and then wouldn't sleep well at night because of it either.

Watch for the first signs of tired during the day too, and lay him down for naps right away then too. 

 Jill - Proud mommy to my handsome Keegan.

I say let him cry it out...thats what we had to do at 3 months to get our son to sleep through the night.  Took 3 nights and by the 4th it was no problem.  Good luck.

Emily Mazza - City Ambassador for Miami Moms Like Me

www.facebook.com/emily.mazza

Find me on Twitter @ Emmeelue84

CLUB 1000 MEMBER

Both of mine went through periods where they would wake up more often during the night.  I co-slept with both of mine until they got a little older (then they seemed to prefer to be in their own beds, so I followed their cues).  I would just let them nurse back to sleep and fall asleep myself.  They eventually fall off and once they learn to foll over, they would roll over and sleep with their back to me.  There's nothing better than snuggling with your baby and your hubbs in the early morning hours! 

Manda

This sounds like he may be getting ready for a growth spurt.  As long as he isn't pooping green he is probably getting hindmilk in his nursing sessions and therefore a lot of nourishment that is growing body needs. Mothers (in general) produce more milk during night time and early morning hours so a lot of infants will nurse more at night when they need it.

Give it a couple of weeks, but at his age, nursing on demand is still a very good idea.

"I miss the days when I believed if I had a cape and a nice tiara and I would be able to save the world."