Vacation & OPKs

I went with my friend Stephanie to Florida from Monday until yesterday. I didn't bother taking my OPKs with me since there would have been no point, and I was worried I might miss getting a positive. BUT, yesterday afternoon when I got home I tested and the second line was nice and dark on day 14. I know the strips don't mean that ovulation will happen and that only temping can show it for sure, but I do love those dark lines.