Very VERY faint line or Evap?!

I'm not supposed to start AF until between 5/7 and 5/9 so it's still a little early. I'm not sure how many DPO because I'm not 100% when I ovulated.

But... Could this be the start of my BFP?! I've never seen an evap line before in person and I know blue dye tests suck, but has anyone else experienced this and ended up being pregnant?

I've been having mild cramps for about 4 or 5 days now and today my breast are sore. I've been having very vivid dreams too, but other than that nothing else.