direct primary. a primary in which members of a party nominate its candidates by direct vote. Compare indirect primary.
I think unless you've had some medication in it with hCG lately (usually fertility drugs) that you are most likely pregnant. I don't believe there are any hormones that fluctuate with menaupose that would cause the false positive, hCG only rises with pregnancy and that's the only thing that the home tests look for. Hypothyroid medication wont affect the pregnancy tests.
One common corrupting agent to the pregnancy test is exposure to soaps or detergents. These can cause a false positive result. Thus urine collection should be done carefully to avoid such exposure. Many tests simply have one urinate directly on the stick used to give results.