Which should I go by?

So, I'm pretty irritated. This is my first month using OPKs. On CD 11 I got an almost positive line test; i had ewcm. On CD 12 I got a peak with a clearblue line test; I had ewcm. CD 13 I got the digital clearblue advanced, it showed a plain circle (low)I had sticky cm. CD 14 I got a solid peak smiley; I had sticky cm. Now, on CD 15 I got a very negative line test and sticker cm. Was the first peak my actual peak or the second peak? Do I believe my cm or the tests? Soooooo irritating. Please help. Any opinions greatly appreciated!