Oh, and if you have not had sex in this past month, it's doubtful you are pregnant hon. :>)
I'd just use a regular pregnancy test (don't need early detect at this point) and test in a full week after your last test. But your hormones could be off and you are just super late. It happens. Doctors like women to have periods at least at 3 months, so if you go that long, talk to your doctor. good luck