Is this an evaporation line?

So this test is totally invalid because it's outside the time frame by several days and I took it at only 3 DPO, so I know it doesn't really mean anything. But is this an evaporation line? It looked totally blank when I first took then I checked a day later and saw a faint line. It started off as a super faint medium thickness pink line, but now the original line is more faint and there is a really thin grey line down the left of where the original is. Thanks :)