Mouth breathing

I’ve been sick and mouth breathing for the last week or so since I supposedly ovulated. Could that be what is screwing with my temps so much?? I tested this morning and it was below coverline. I fell back asleep for another 3 hours. When I woke up again, I closed my mouth for a few minutes and tested again and my temp shot up above coverline! Could be because it was a few hours later though, I guess. I thought charting was going to be easy haha!