A member asked:

I took a pregnancy test today, the e.p.t home one. and it was negative but i am four days late on my period? today i took a home pregnancy test, because i am four days late. it was negative but i have can not ever remember my period being this late. but a

2 doctors weighed in across 2 answers

Please : Please wait 2 days then take another test if you still don't have your period. It is unlikely that the B12 shots are affecting your period. If you are still not sure after your next test, then you could go get a blood pregnancy test which is more accurate.

Answered 10/3/2016

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Dr. Heidi Fowler answered

Specializes in Psychiatry

HPT: Reasons for missed /late periods: low body weight, obesity, marked weight gain or loss, over-exercise such as in endurance athletes, breast-feeding, stress, illness, eating disorders (bulimia or anorexia), travel, hormone irregularities, drug use, medications (i.e., birth control) or med problem (polycystic ovary syndrome or Asherman’s syndrome. #1 reason is pregnancy. Can retake in 7 days.

Answered 10/25/2018

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