Newborn and an 18 month old?

I recently gave birth a couple of days ago and I also have an 18 month old who had all the attention before the baby came and he’s a really ruff kid so sometimes I can’t be around him when I’m feeding the baby and he’s been crying a lot he wants my attention i feel so horrible I broke down and cried because he wants my attention when I’m holding the baby and if I don’t give it to him he cries and lifts his arms he wants me to hold him so I have to put the baby down and hold him but it’s so hard I feel like a horrible mother 😢 when the baby Is sleeping I give my toddler all the attention. I didn’t think it would be this bad one baby cries if I don’t hold him then the other one cries at the same time not to mention how sleepy I get from being up at night feeding the baby so sometimes I can’t take a nap when the baby is sleeping. Any advice for moms who have babies under 2?