5 dpo, questions.

Okay, so today marks five dpo and I'm a little confused. My periods are regular, and I've pretty much gotten my ovulation down to a science. I have had a lot of egg white cm today and yesterday. A little more than I typically have during my peak ovulation days. I usually dry up right after ovulation, so I'm not sure what is going on this month. How likely is it that I have miscalculated my ovulation? What could be another reason for this? Like I said, I am pretty sure I ovulated, then dried up for a couple days, and BAM ewcm! What's going on?