is there still a chance?

Ka

alright so i got a faint line on a Walmart cheapie, then 2 unclear blue dye tests. probably negative. period was due 1/2 - got it one day late. I had some cramps but nothing crazy, never got red blood just pink spotting and it's gone now just a day into it, I've been extremely gassy.. is there a chance I could actually still be pregnant? I had sore boobs for a week and a half before my "period" and that went away instantly. Coincidence or possibility? Anybody have any similar stories?