EWCM after ovulation?

I went to the bathroom this morning, and when I wiped I had a TON of ewcm!! but my opk's said that I would have ovulated about two days ago. Does this happen to anyone else? I don't understand why I'd get the fertile mucous after I was supposed to be fertile!! help? should I BD again tonight just to be sure? we didn't do it last night and I hope I didn't miss the window! :(