Help! Opinions..bfn or bfp?

According to Fertility Friend, I am currently 11 dpo and am expecting to get my period tomorrow. On 7 dpo, I had some light pink/ brown spotting after bd'ing which is unusual because I never spot and thought this may be implantation bleeding. Have been having cramps for awhile now. Decided to test yesterday using WalMart First Signal cheapie test and ended up seeing a very faint skinny pink line beside the "T" towards the bottom. So hard to see on the picture I took but if I stare and squint enough, I can see it because I know it's there. Even inverted it to see if I could see it better and think I see the same thickness as the control line. Is this an evaporation line although it is pink but pencil thin or an early positive?Does anybody else see it? Thanks for any input.