False Negatives??

Hi guys! My period is due this Saturday March 5th. Took a test today, the 3rd. It came back negative...I was just curious to if any had negative tests but still ended up missing their periods? I'm just trying to be hopeful! And any input would be great! I have been trying for 3 months now and it's getting discouraging, I also know many couples try for months even years! Just need some input and encouraging words.