Around 3.5 months she started waking every 2 hours, so I started putting her in bed with me for the last few hours so I could sleep a little more. About a month later she really started struggling and woke every hour for about 2 weeks. We still coslept the last few hours. She eventually started sleeping a little longer but that was short lived and she didn't want to be put down and would wake frequently. 

I thought maybe she was too big for the bassinet now. So we moved her to her crib where she slept amazing a couple of nights (4 hours) and then out of nowhere the past 5 days she has refused to be put down. She will fall asleep in my arms and will be instantly awake and crying if I try to put her down, no matter how long I wait or how many times I try. She sleeps fine if we cosleep though because she can nurse whenever. I'm struggling with this. I like having her in our bed for a couple of hours, but the past several nights has been all night. I want her to sleep on her own some. I can't let her scream and cry though. I don't believe in the cry it out method at such a young age. Does anyone have any helpful hints for keeping her asleep while laying her down?