Help please

doll

So I took a test 2 days ago early in the morning.. kinda didn't pay much attention to it because I knew it would be negative. I have been getting positive OPKs ALL week long since Sunday. I randomly picked up the old pregnancy test and noticed that it in fact had a second line. I compared it to another test I took 3 months ago & that had no line AT ALL. What do you guys think? Evap? This has never happened b4.