super tired during fertile week

Teri-lyn • Mon, Nov 24 • 19 F Calgary ab mommy to a three year old minature pincher ttc baby #1 with my bf

So for the last two or so days of my fertile week i have been nonstop sleeping bd the last three days in a row but very very tired to day I dont usually sleep more then 7 hrs but latly the last two days iv self 16:to 20 hours Is this normal to be super tired after ovulation ?