One pregnant test, faded line, another faded line appeared but vanished, what does this means, please help?

Depends: It could represent a very early pregnancy or a false positive test. Call your md with your concerns and a blood pregnancy test can be done.

Re do test: If you had sex since your last period and missed your period by 4-5 days, do a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD.