Hello, and I hope I can help you today. If you have not yet missed your period, even if you are pregnant, the line will appear very faint on the pregnancy test as your hormone levels are extremely low at this time in pregnancy. So there is no reason to assume that the test was wrong as the greatest likelihood is that you are actually pregnant. However, women can have a situation where they have a positive pregnancy test and then get their normal period on time. This is known as a chemical pregnancy and is caused by the situation where the egg is fertilized but never implants into the uterus and continues to grow. So I encourage patients in general to try to avoid performing pregnancy test before they actually miss their period, as even though you have a positive pregnancy test this early, it does not guarantee that the pregnancy is going to take. If your cycle is late, there is no reason to assume that there is any problem with the pregnancy. If you do retest after you miss your period and the line is still very weekly positive, it may be reasonable to see a physician and get a blood test for the level of your pregnancy hormone. Pregnancy hormone levels are supposed to double every 48 hours so by the time you miss your period the levels should be significantly high enough to produce a clear double line on the pregnancy test especially if you perform it with your first morning urine as recommended. Low hormone levels in early pregnancy can indicate that the pregnancy is not developing properly or that it can be an ectopic or tubal pregnancy, which needs to be diagnosed and accurately managed by a physician. In the meantime however, I encourage you to stop drinking alcohol, eat a balanced diet, begin taking prenatal vitamins and get enough sleep as a greatest likelihood is that you are pregnant with a very early normal pregnancy. I hope that I was able to adequately answer your question today, and that my advice was helpful. Best wishes and good luck with the pregnancy, Dr. Brown