But now I just read this and feel better again:
"So I thought I would sit and write a few facts about various similar tests. I am a clinician and I also have much experience using various tests within laboratories or clinical settings. I have also been trained in the medical micro-biology (lab-testing). The home pregnancy tests are 'assay' tests which rely on specific reactions between chemicals, to produce colored lines. The 'control' lines of the home pregnancy tests are assayed areas which are designed to react with specific chemicals commonly found in urine, and which, when detected, react with the chemicals in the control-line assays (strips/areas) and turn them a certain color (pink or blue depending on the test used). However, the 'pregnancy' assay (test -area/strip) is designed to change color only if it comes into contact with the HCG hormone – the 'pregnancy' hormone. HCG is only produced when an egg has been fertilized. So then, if no conception has occurred, then no HCG will be produced by the body, and therefore, no HCG will ever be found in the urine.
The 'pregnancy' line contains different molecules to the molecules of the 'control' lines; and the molecules in the pregnancy line/strip (the pregnancy test-assay) will only react – and change color – in the presence of one other molecule; and that is the HCG hormone. No other molecule or hormone will cause it to change color."
This makes a lot of sense. Will stick with this thought process. "A pink line is a positive line"