So confused!!!!

Ok so my cycles are usually 28-33 days so I began taking opk to catch my fertil window. Got first positive opk on CD12 and I ovulated CD15 because I had the ovulation pinch I normally feel on my overy. Glow says that AF is due on CD26. I've never had it come before CD28 ever. Could it be that a period doesn't always come 14 days from ovulation? Could it be that AF can take more than 14 days to arrive even after confirmed ovulation? I'm so scared that the opk threw off my dates and I actually BD too early that whole week!!!!