Took 5 pregnancy test 7 days before period was due they were all positive how accurate is this?

Home pregnancy tests are generally very accurate, especially if used correctly and according to the instructions provided by the manufacturer. If you have taken multiple pregnancy tests and they have all come back positive, it is highly likely that you are pregnant. Here are some factors that affect the accuracy of pregnancy test:

1) Timing: Home pregnancy tests work by detecting the presence of human chorionic gonadotropin (hCG) in your urine. hCG is a hormone produced by the placenta during pregnancy. Pregnancy test are most accurate when taken after a missed period. If you have taken the tests 7 days before your expected period, it is possible that the levels of hCG in your urine may be too low to be detected by the test, leading to false negative results. Waiting until the day of your missed period or a few days after can increase the accuracy of the result.

2) Quality of Test: The quality and sensitivity of home pregnancy tests can vary depending on the brand. Make sure to use a reputable brand that has a high sensitivity (e.g., able to detect low levels of hCG). Check the expiration date on the test and discard if expired, as it may give inaccurate result.

3) Correct Usage: Read the instructions provided with the pregnancy test carefully and follow them precisely. Incorrect use, such as insufficient urine sample, holding the stick incorrectly or not letting the test sit for the recommended time, can affect the accuracy.

4) Cross-Reactivity: In rare cases, some medications, such as certain fertility treatments or medications containing hCG, can interfere with the test and lead to false positive result. Medical conditions like pituitary disorders or some tumors may also cause elevated hCG levels and false positive result.

However, it's important to note that a false negative - getting a negative result when you are actually pregnant - is more likely compared to a false positive result if the test is used properly and within the recommended timeframe. If you have taken multiple tests and they are all positive, even before your missed period, it is very likely that you are pregnant.

It is always recommended to reach out to a healthcare provider for confirmation of pregnancy. They can order blood test to accurately measure hCG levels, perform a physical examination, and provide additional guidance and prenatal care.