Negative pregnancy results usually indicate that you are not expectant while positive results show that you are expecting a child. Evaporation lines Previous miscarriage or abortion Molar pregnancy Medications Medical conditions Accuracy What to do if a pregnancy test is positive If a woman is trying to conceive or suspects she may be pregnant, home pregnancy tests can be bought at pharmacies and many stores selling personal hygiene items. These are called false negatives and these are more likely to occur compared to false positives. If you think you may be pregnant, take a home pregnancy test or talk to your doctor. Kidney stones are formed when the majority of foods you consume contains oxalate or phosphorus. If the test is negative, you will not see any kind of reaction but if the test is positive, you will witness a reaction as the toothpaste will turn frothy and change its color. If you miss your period but get a negative pregnancy test, there are a number of possible explanations.