Kyleena and exhausted!

I got Kyleena a week and a half ago and for the past few days I’ve been exhausted to the point I am fighting a nap in the middle of the day. I have 2 kids so naps aren’t really possible. The exhaustion reminds me of early pregnancy exhaustion but I got it inserted on day 3 of my period. I also did an ovulation test this morning and it is almost positive! Is this normal to experience with Kyleena? Is my body just adjusting? I have zero side effects so far besides the exhaustion.