When to test?! Help.

Jay
How am I sure when to test? I know fmu is the best. But how am I supposed to be able to test with fmu when I'm waking up In the middle of the night to test? Which is odd for me. When I was about 4 days late I tested and it was negative. But I didn't use FMU. And now I'm a week late. With still no signs of AF..