Okay, so I seriously need opinions! Two weeks ago I posted a pic of a clear blue preg test that had.…

Okay, so I seriously need opinions! Two weeks ago I posted a pic of a clear blue preg test that had. Very faint positive line, it looked like an evap line. I took three more test and they all came back negative. I brushed it off as an evap line, I was supposed to start my period the 14th and three days ago I thought I started, but the blood I've had has been maybe a few drops on a couple tampons. I'm starting to think it's implantation bleeding.. if I am pregnant I would be around 4 weeks right now. I'm so confused!!!!