What do this mean

Sakira • mother of three beautiful girls💜❤️💛 and a handsome baby boy 💙

the weird thing is I was spotting light pinkish white to light brownish discharge with mild cramping around cycle day 12-13 then nothing don't know what that could be neither do u have any indication of what it could be took a pregnancy test the digital one says not pregnant so I opened it up and it has two lines. What do this mean am I pregnant