Implantation spotting help

So I had spotted light pink when I wiped and now it’s gone(yesterday when I was 4 days late)….. I’m 5 days late and been cramping but no sign of AF.sometimes the cramps don’t feel like period cramps more so like a tug…I ended up taking a pregnancy test this morning it was vvvf, was unable to see on the camera! But took another and absolutely nothing? Should I just keep testing every morning if AF doesn’t show? Was the light pink spotting implantation?? And it takes time to appear a positive??? So confused