Baby won’t nap in the evening

Cierra

My baby is 7 weeks old. The last few days in the evening (between 7-9) he gets so tired but will not nap or even be soothed by anything. He usually loves his swing or just to be held but not in the evening. He just screams and screams. He’s been fed, he’s been changed, and he naps so well during the day. What is going on and how can I help him?! I hate to just let him cry but nothing helps!