Likelihood of blood test showing pregnant tomorrow after month and a half missed period & multiple negative home preg tests?

You tell me!: Did you do the tests correctly? How often/when in your cycle did you have sexual encounters? Have you been using any sort of birth control? Irregular or missed periods/cycles in the past? When did you perform the tests in relationship to missed period? There are many more questions I could ask to help determine that "likelihood". Don't have unprotected sex if you don't know how these affect you