Based on only my experience with pregnancy tests, they are pretty accurate. Whether you are miscarrying, having an ectopic pregnancy, or just flat out pregnant, the test should read it. The hormone HCG comes from the baby, not from the woman. So, if you are testing positive, there is definitely something inside you. However, I have only heard that some women that have already miscarried and werent' aware of it may still test positive a few days after.
No
there is always an error factor but with a blood test you can be pretty sure its correct.
no
yes it affect bu afulse positive result
See this answer: "No, melatonin would not give a false positive result on a pregnancy test, however melatonin does increase the amount of the hormone which pregnancy testing kits look for if you are pregnant so you may get a true positive earlier than normally possible. Many pregnancies are rejected by the body very early in development. " Source: Can melatonin give you a false positive pregnancy test reading
The gallbladder has no effect on hormones of pregnancy. Gallstones will not affect a pregnancy test.
No it can not.
No, the test does not measure the chemicals in weed. Only medication containing HCG will give you a false positive pregnancy test. See your doctor for confirmation.
No, it shouldn't do
If the test is done properly, the chances to give false positive test are very slim indeed.
Some infections in the kidney can cause false positive dipstick test results but not false negative.
I am almost positive that it doesn't show hcg in a falsified pregnancy result.