are you married or planning to conceive or not possible to get pregnant and worried???
one week seems ok .....unless you r super punctual kind
for a start, buy a home test kit to try. I used BBnews from watsons. Very accurate. Price around $8.90 or $9.90 only.
pregnancy can be tested as early as 14days after conception.
if you r still worried, go to a trusted GP to have your urine test taken. More accurate.