Everyone is busy and overtired during the holidays.
Stress, being overtired, or too much alcohol can all play their part in causing a flare-up.
Naps help prevent babies from becoming overtired which can worsen existing sleep problems for months.
After all, she's probably overtired, sore, and still recovering from the birth, not to mention pregnancy.
While it is good to keep your toddler busy, don't forget to schedule in some down time so that your child does not get overtired and cranky.