Yes, possible that you ovulated late and that is why the test is neg. You really need to use FMU (first morning urine) for the best result and spend the extra dollars on the one that says pregnant/not pregnant - saves for a lot of guesses if there is a line of not. I ovulated late when pg with DD & i think it took until CD 35 with FMU urine for a very feint positive. I'd probably test in two days in the AM. GL