Stress please help

The last time I had my. It was 42 days ago my period Is also 10 days late I went to the doctors office on base because my husband is in the military to see if I was pregnant but the pregnancy test said I wasn't and I got blood work done and I was wondering does anyone know how long does it take for the test to come back to let me know if I am my period has never been more than a month late or even a weekly