Daughter is waking up more often at night. We're on exclusive…

Daughter is waking up more often at night. We're on exclusive breastfeeding. She wakes up every two hours for a feeding within a week. Thank God we fall asleep right after. But the question is different. We used to sleep for 4-6 hours at night before, but now this joy has stopped abruptly. Is this normal or could she not be getting enough milk from me? After all, I have been slightly reducing my diet for a week, coincidence?