Anyone get at false negative at 15DPO?

[Belle]

We're not TTC. Dh had a vas last December but has not gotten a semenalysis done yet. We used backup protection for the first three months but have been lax lately. I've been charting for informational purposes. Anyway, yesterday was 14DPO. I've never had a period later that that when I wasn't pregnant. I tested negative today, but am not sure about it. Haven't wanted to worry dh unless I get a positive. A little freaked though. No sign of iminent AF. Help? Maybe I'll test again in a couple days.

[Lovenest]

Do you have a link to your chart? Are you sure you did not ovulate later than norm?

[Belle]

No, I don't have a link to my chart. I've got the old version of Ovusoft. I must have ovulated later though. AF arrived this morning. Thanks.