Stopped swaddling now what?

We stopped swaddling our baby when he started rolling over. Since we've stopped he hasn't slept 1 full night whereas prior to this he was sleeping straight through. Now he wakes up crying sometimes hysterically, not necessarily wanting a feed. Sometimes he does other times he's not hungry. Whatever I seem to do, it doesn't work. I'm getting really tired, I can't tell you the last time I slept for longer than 2/3 hours, I feel like I'm running on empty. Anyone has any thoughts, ideas or experiences to share? I'm willing to give anything a go. He's 7 months this week.