A positive test result is almost certainly correct. However, a negative test result is less reliable. The result may not be reliable if you:don't follow the instructions properly or take the test too early .Some medications can also affect the results.Make sure you read the instructions carefully before you do the test, because pregnancy
tests use different methods and display the results in different ways.You can take the test from the first day of your missed period. Tests carried out earlier than this are not always accurate. If your periods are irregular, you may not be sure when this is.Check the instructions to make sure you can do the test at any time of day. It’s usually best (but not essential) to take the test first thing in the morning as your urine will have the biggest concentration of hormones then.Avoid drinking too much fluid beforehand, as this can dilute the level of HCG
in your urine.Hope this helps.Take care.