It's pretty normal to have test line darker than control line on any brand of test by 5w4d @missmcgonnagal, there's really no reason for you to think you're having twins based on a HPT line.
Mine was just a Walgreens one. I wasn't trying to get pregnant, in fact, I was on medication for ADD and all the signs of pregnancy were also side effects. I contacted my doctor and they told me to go see my reg. doctor as the side-effects shouldn't have just come on like they did. Wondering if I could be I ran out to get a test. Sure enough I was preggers, it didn't even wait the 2 minutes that it said to it that plus sign showed up as soon as the pee hit the window area. I had been a week or two after the missed period so yeah.
I flipped a digital test more than the single test line soaking all the color on the control line.Saw twins on the u/s yesterday.
An evap line (evaporation line) is a faint line that appears after a negative test has dried. Because tests are typically meant to be read three to five minutes after they are taken, the tests are still damp at the time they are read. After this time frame passes, the urine in the test dries. As the ink makes its way across the screen, the result is displayed. Sometimes, as the ink moves across the screen, a little bit of ink will accidentally get caught in the indent line. As the test dries and the urine evaporates, this caught ink is pulled to the surface and becomes darker.
This is why the most important rule for getting a true positive pregnancy test is: do not read them after the allotted time! The results are only accurate in the time frame specified in the instructions.