Baby slept through the night and i'm worried

Diana
My baby is 4 weeks and 1 day and slept for 7 hours straight. Is it normal so soon? Should I wake her up more often to feed? I'm breastfeeding exclusively and, as far as I understood, breast milk is digested a lot faster than formula, so I'm worried that she slept too much. Usually she would wake up every 3 to 5 hours.