nervous for labour and my husband

My Husband and i have been together for 4 years married since August. He is never able to take anything seriously unless it involves him personally or he's mad. When it comes to me and the kids he lacks empathy. I'm due in May with my second pregnancy and am getting nervous how he will be during labour... I asked him if he will be able to be my rock that one time for how ever long it takes and instead of reassuring me nothing but the beat he gets his back against the wall and becomes defensive. It's hard to talk to him about anything with this pregnancy and I'm now becoming nervous and unsettled.. 😕 how do I become more stable with myself when it comes to planning my birthing process?