My fiancé went back to work today :(

My fiancé took five days off of work for the baby and it's already up. I know it's foolish, but It's hard not to feel abandoned and alone and I'm afraid to take her places by myself. All my confidence feels gone. You have to work to make a living and I'm greatful he is working so I can enjoy my maternity leave... I'm just sad our family time is over. Did anyone else have a hard time with this? He works 3-11 and she's mostly fussy during this time so I'm hoping I do ok.