I m 18 days late i have never been late before no period spotting really light blood ...in the 5th days i took a pregnancy test but late please help?

Amenorrhea: If you were having unprotected sex , pregnancy could be a possibility. However, a positive pregnancy test should be positive by the time you miss your period. There are multiple causes why your period might be delayed: pregnancy, thyroid disease, obesity, certain medications, stress, anorexia, excessive excersice etc.

Late period: It's hard to say why it happens, but sometimes we are just late for our period. Even if it's never happened to you before, it could be happening now. Things like medications, stress, travel, changes in your weight, can all cause a late period. If your pregnancy test is negative, repeat it once per week until you get your period, to be safe. If no period for a whole month, i would see your gyn doc.

Other reasons.: If you have regular 28 --30 days cycles and have a neg home.Pregnancy test by day 37 look for other causes .Such as--- ovarian cyst, thyroid problems etc . See your doctor to rule out tubal pregnancy . You may need a blood pregnancy test.