M Is it meen to let my son cry?

My son is 4 months old, n to be honest I just don't feel like holding him. So I swaddled him up and put him in his crib, he's been crying for about 30 mins non stop. I have a 27 month old who is driving me crazy as well. So I feel bad but I need a damn break ( s.a.h.m.). Yes he was fed n changed as well so I know he just wants to be held. What else can I do