Quoting Red Bottom:" It sounds a bit like you had been pseudo trying since you've been semi tracking your ovulation. If you ... [snip!] ... wait another week before you test so you're not obsessing over it daily and not wasting a bunch of money on pregnancy tests."
Quoting Millsh:" Very possible. My periods weren't always very regular before getting pregnant anyhow. Also, the only ... [snip!] ... happened and using a calculator. I'll probably just take one tonight and then try to forget about it until after the holidays. "