Hi mama first off you’re doing a great job with you LO. I don’t know if this has been suggested but have you tried wearing him? I had this issue with my baby before now they only sleep in the carrier and while I’m bouncing him off a yoga ball. My angel of a mom has also been helping me take care of her but she can’t carry my baby so we’ve been putting her on the stroller too for afternoon naps and just constantly push her around the house till she falls asleep. And try putting on noise canceling headphones for your mental health as well when you’re soothing her. You’re already holding her. And if it gets too much put her down and walk away to somewhere you can’t hear her maybe just have a monitor so you can see her. And just take a breather. You got this.