I took a test as I'm a few days late but I am irregular. I accidentally peed all over the test window and it seeped under the plastic but a few minutes later a control line showed up and a very very faint pink test line showed up, it didn't run across with pink and then fade like it normally does it just showed up. Could this be a positive or an evap line?? I took another test afterwards and it didn't show a line but my urine was very concentrated