Period arrived yesterday evening. Devastated again. 16 months and no pregnancy. Fed up.
I would say by now, if you ovulated like you normally do, and were pregnant that it would show up on a test.
But, like you state it's possible you ovulated later this month - which means your period will be late, or if you conceived, it would be too early to tell just yet.
I would say wait another week (hard I know) and re-test if no period had arrived yet. That way you have left plenty of time for implantation (if you were to conceive and ovulated later) or for a period to arrive. Did you test with first morning urine?