14 month old sleep

An

We decided to move my son into my daughter’s room. Last night was absolutely horrible. He only cried for 10 minutes or so before he calmed down. However, we didn’t get much sleep. When he did sleep he was sleeping sitting up. He wouldn’t lay down at all. That caused him to jerk a lot which lead to his crying off and on throughout the night. When he would cry he would lose his paci as well. Any tips on how to get him to lay down?