Horizontal line instead of vertical?? WTF is going on!!!

Ok, so I've bought the same clearblue test for the past couple times I've tested (past 3 months). The way this test works is that you need to see 2 VERTICAL lines for positive results. The last 2 times I've taken this test, absolutely NOTHING has ever showed up in the test window. Took another one of these tests this morning and now I see a faint HORIZONTAL line in the test window. Again, no lines period have ever showed up before in the test window...I've heard conflicting opinions of this...many have said that even though the line was horizontal, it still meant they were pregnant. Has anyone else had this happen and found out they were pregnant?? Any help on this matter is GREATLY appreciated!