help!

Please, don't anyone be mean. I'm just beside myself. My son (3 months) has been screaming a lot lately! He used to play by himself for a while and be happy. Or just sit with us happy. Lately it seems like he screams when ever he's not in my arms and I'm not bouncing him standing. My husband and I always talked about not coddling him, using the cry it out method, but I don't know if it applies in these situations. It's starting to affect us as weee arguing a lot when he screams. It's grates on your nerves. He thinks we should let him lay there and scream (fed, clean diaper, I think his body temperature is okay, no fever)  I want to make sure we're doing the right thing. He is not neglected for sure, he's very loved! I don't know what to do. As I type this I'm holding him and he's screaming in my ear. Help!! 😭😫
Also, my husband is amazing. He's supportive and helpful and loves our son so much! So nothing bad on him, I just don't know what to do.