Are Pregnancy Tests Ever Wrong?
Another thing that can make pregnancy tests inaccurate is a tubal pregnancy. You may have minor amounts of HCG in your system, but the pregnancy is in your fallopian tubes rather than in your uterus.
The pinker (or bluer) the line on your test, the higher concentration of HCG you have in your system.
The pinker (or bluer) the line on your test, the higher concentration of HCG you have in your system. If you take a test and it is light or faint, chances are taking the same test the next day – the line will be darker. If your line never turns darker or more defined, you should get another test. If it is the same on the new test – you might want to call your doctor for a blood test.
Doctors will normally do blood work to decide pregnancy for sure. They may have you come in for two blood draws to ensure that the HCG is doubling properly, and will suspect a problem if it isn’t. Blood tests for pregnancy are by far the most accurate method of confirming pregnancy.