Short answer: A single negative blood test may not completely rule out pregnancy; also, the medication your doctor prescribed may affect your menstrual cycle timing. Follow-up and additional tests may be needed for a definitive answer — consult a gynecologist/obstetrician.
Summarize the situation: Your expected period is late, the only blood test performed was negative, and your doctor prescribed medication; you have been taking the medication for about 6 days and still haven't had your period. The following steps are often recommended as medical guidance:
- Repeat quantitative serum beta-hCG tests may be ordered (repeating them every few days may be more helpful).
- If necessary, imaging (pelvic ultrasound) evaluation may be scheduled by your gynecologist. - The effects of the medication may delay your menstrual cycle; follow the instructions of the doctor who prescribed the medication and ask them any questions.
Emergency symptoms (seek emergency medical attention if these occur): severe abdominal pain, fainting/dizziness, very heavy vaginal bleeding, high fever, or sudden worsening of symptoms.
Which specialist to see: A gynecologist/obstetrician. When you go for your appointment, please provide your expected menstrual period date, negative blood test result, the date you started taking any medication, and any other symptoms.
This page is not intended as a diagnosis or treatment recommendation; consult your gynecologist for definitive guidance.
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