Hey! It’s very normal! In fact, you are fortunate that baby can sleep that long so that you can have a break too. My PD told me that it’s perfectly fine to let baby sleep and not wake baby up. He said baby will naturally wake up to cry for milk when they are hungry. But of course, subject to the fact that your baby is healthy and doing well. My LO at 5 weeks also sleeps close to 5 hours for the first stretch at night. So not to worry. (: