Just took paternity leave and I'm panicking

Got 6 weeks off to be with baby number 3 and honestly I'm terrified. My wife is healing, I'm supposed to handle the house and the older two kids and help with the baby. I took the time off but now I'm checking in with work constantly because I feel like things are falling apart without me. My boss keeps texting. Is this normal? Does the guilt go away or am I going to feel like I should be at the office the whole time?