Helpless

I’m one week pp. having a one month confinement nanny at home looking after the baby. These few days realised that the baby seems very attached to the nanny. Whenever he cries, either me or my husband carries him, he continued crying until the nanny carries him and he will stop. As new parents, we don’t know why baby is crying and felt helpless. Now we are worries if nanny goes back after one month, what are we supposed to do? Hubby will go back to work but what about me staying alone w my baby? How am I suppose to handle this? :(