First time mom here and we have a strong willed feisty little one here who does not like to go down for naps or bedtime very well. We are lucky if we can get her to sleep within an hour of bouncing on exercise ball for most naps and bedtime can take anywhere from 2-4 hours, even 12 hours one day when she was around 1 and half months old. We are so diligent with watching sleep windows and cues for her age, have blacked out room, sound machines, read many sleep books and wondering if other moms experience this? And if they had any luck with sleep training at 4 months old to teach them how to fall asleep on their own? And at what point it seemed to get better for them? Thanks for any input!!