Husband is on night shift and I can’t sleep

Guys I need help! My husband is on night shift and has been for a few months now. But it’s just been recently that I’m having really bad anxiety. Like once he leaves and it gets dark I jump at every little noise. I can’t sleep well I toss and turn and it’s like my brain is constantly on looking for danger. I feel like I’m going crazy. I literally get most of my sleep on the nights that he’s off and sleeps beside me. Do y’all have any tips to help ease my mind and anxiety about this.