J.A.
All my kids had the acid reflux and needed to have their heads elevated to sleep. My first two slept in their car seats! When babies are in the womb, they are in a tight surrounding atmosphere and feel safe and secure, which is why we swaddle them and which is why I think they like to sleep in their swings and car seats. I found a really great sleep "chair" on nappytime.com. It is shaped like a car seat but I think it is a little more comfortable. I put it in his crib. He sleeps from 9:00PM until 5:00am. Your son may be teething as well. This can cause sleep disruption too.