It could be, but even if so, at 39 there will probably be a pretty long time before the lack of a period is a regular thing, it would only be likely to happen every now and again.
But also, sometimes women just don't ovulate in a given month. At 39 even with your family history, I'd be more apt to assume that is what happened to you. If you don't ovulate, no period comes two weeks later. See what happens next month.