feeling hopeless 😞

Just had my LO 1 month ago I've never felt like this a month ago it just started 2 days ago this sad feeling, not towards my baby but towards myself, like can I really do this? Can I really take care of 3 children now? How am I gonna go back to work and still provide? What if my fiancé leaves me? Just a lot of what if questions  my son is so beautiful 😍 so happy and handsome he deserves a better mother than me.