Scared to take care of baby alone

Just birthed a 7 day old baby. Much as I love him a lot, I am feeling SO afraid and am extremely lack of confident when my nanny leaves after 1st confinement month. Second month onwards my husband will be working mainly with long hours and I'll be left alone with baby with no help from anyone. I am scared I cannot handle baby alone, etc the crying / unable to settle him. Feeling a little depressed now. Any tips anyone?