3 days late and negative pregnancy test .

Jackie • Happily married!SAHM to a wonderful 2 year old boy !TTC baby #2 since Jan 2016
My husband and I have been TTC since Jan. My periods have been regular down to the day and hour since I can remember . I'm now three days late with a BFN . I tested on Monday . My only symptom is sore breast . Has this happened to anyone ?could I be pregnant ? 
Thanks in advance .