evap lines

Okay I totally KNOW that you aren't supposed to read a test after the time limit but I took a test at like 2am because I was just curious and I looked at it right after but it was negative. I just put it back in the box, upset obvi. I looked at it this morning at 7am and there was a line. I know that there are evap lines but this line has color to it and is about where it is supposed to be. I have neverrrr had something like this happen. Haven't had a period since beginning of November.