It’s normal if NIGHT time ! Nothing to worry! Babies hungry will cry they not dumb! So no need to worry! But the only problem is if 5 hours straight in the DAY TIME then baby might have difficulties recognising DAY & NIGHT! Usually I’d use COLD towel to wipe my baby face then tummy time in DAY TIME max sleep 6 hours in the DAY time! My baby had no difficulties recognising day and night