Am due my periods in a week if I took a pregnancy test the now would the result be reliable?

Highly unlikley. While it is so tempting to see ifyou are pregnant, it is way too early for any pregnancy hormone (beta hcg) to show up in your urine for a home pregnancy test. A blood test would also be negative as well this early as an embryo would just be implanating about now (5-7 days after ovulation), and not secreting bhcg over a very minute amount.
No. Even though newer urine pregnancy tests can detect positive pregnancy prior to missing the cycle, they are not reliable this early. They become more reliable approximately 3 days before missing the period.