Idk how I’m supposed to put my toddler to bed when my newborn cries if I’m not holding him.

My toddler is extremely difficult and cries a lot, I lay down with him to sleep and it takes a while sometimes. Sometimes not. He cries and cries and cries no matter what I do unless I hold him and since I’m postpartum I can’t hold him. He’s heavy. He might also be autistic but I’m not sure yet, I can’t seem to communicate with him he just seems like an infant mentally. He’s 2. Won’t look at me, won’t listen to me, he just runs around screaming happily or screaming upset. Bedtime routine doesn’t work as he is constantly on the move and will not sit, not even for a second. It makes reading to him impossible which sucks because that’s been my go-to time for sleep thing with my oldest. (Now 6)

Neither child wants my husband and will cry even when they are with them. My newborn is 10 days old constantly wants me and I can hardly shower without having to make it a speed shower because I hear him crying. There are small windows where he’s awake and happy but it doesn’t last long.

I just don’t know what to do:/