Hey nikita, i'm due in 4 days too (counting today and the actual day) !!!
As for the original post- if you took a test at 1 week late, it should be pretty reliabe (should be, but not always) take another, it's two weeks later now, it should definately show if you are pregnant- either way, go to the doctor, he can confirm or rule out opregnancy for certain.
It could just be a skipped period, but if you are not feeling well, it's probably a good idea to make sure everything's ok.