So, I usually take a test for about 3-4 days before I miss a period (I know, crazy) sometimes I'll just leave them on the counter juuuust in case a line should come up. Yesterday after work I took a test and no 2nd line. So I left it on my counter unknowingly. Well this morning I get up and there's a tiny barely there faint 2nd line! I thought it was the shadow. Anywho, I took another test about 20 mins ago and no line :(