Help please ?

Hi ladies I am 12 dpo and my period is in 3 days. For the past week I have felt "wet" and when I check my underwear there is some discharge I have Also had cramps on and off for the past 2 weeks in my left side and have been very tired. I tested today because glow told me to and it was a BFN =/ is there a possibility that I'm still pregnant?? Fingers crossed