Anyone else's SO gotten extremely clingy? He's been fine through the entire pregnancy until the past…

Anyone else's SO gotten extremely clingy? He's been fine through the entire pregnancy until the past few weeks. He got a new job where he's home more (no more constant 12hr night shifts) so we spend most nights together now. Suddenly when he's at work he constantly says how much he misses me, wishes I was with him, he loves me etc etc. I've tried to ask him what's wrong but he just says he misses me. I don't know what's gotten into him.