if he is suddenly going through this phase, i would suggest try co-sleeping for some time. it will help make him more secure and ease him to sleep better.
try massaging him on the back and head while gently talking to him. keep him in your arms for some time till he calms down, and talk to him in a soft soothing voice. i know it takes a lot of patience, but just hang in there. i experienced this with both my kids and soon the phase passed.