Coping

My baby is 5 days old and it feels like each day gets harder emotionally. I love my baby girl, but feel like I have no time for anything. I forget to eat, shower, brush my teeth and I literally get zero sleep at night. I selfishly miss my pre baby life and find myself feeling panicky and crying all day. My husband goes back to work Tuesday and then I feel like it'll be even worse. Please tell me that plenty others go thru this?!