4fb89720_nd_solving_baby_sleep_problems__What_to_try
[Problem] "Our "high needs" four -- month -- old wants to be held for long periods of time. She spends a lot of time nursing for comfort, and she can't seem to sleep unless she's in physical contact with another human being." [What to try] 
You've discovered what countless other parents of "high needs" babies have discovered before you: "high needs" babies are "high needs" 24 hours a day! There's even hard evidence to back up this parental observation. A University of Reading, UK, study found that children with more challenging temperaments take longer to master basic sleep skills and need more help from their parents to master these skills. While other four -- to five -- month old babies may be ready to start to learn to soothe themselves to sleep, "high needs" babies may or may not be ready to master this skill at the same time as their age -- mates. Research has also shown that parents of "high needs" children need to be more persistent in implementing consistent bedtime rituals, consistent bedtimes, consistent wake times, and teaching their children self -- soothing behaviors.
From A to ZZZZs: The quick guide to preventing and solving baby sleep problems
What to try