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From July 16-19 I have had unprotected sex and econsumed unwanted 72 , my every month expected menstrual date is 2-3-4 and I got bledsing on 3 august for 2 days that was scanty and checking for HCG pregnancy kit for 2 days that is also negative but from 3-4 days I fell nausea why

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unwanted 72 nausea after use spotting negative pregnancy test causes

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Here is a thorough explanation of your situation based on what you have described and authoritative medical sources.

Your Timeline at a Glance

DateEvent
July 16-19Unprotected sex
Shortly afterTook Unwanted 72 (levonorgestrel 1.5 mg)
Expected period2nd-4th of every month
August 3Bleeding for 2 days (scanty/light)
August 3-4HCG pregnancy tests - NEGATIVE (x2)
August 6-9 (approx.)Nausea for 3-4 days

Why Did You Have Scanty Bleeding on August 3?

That bleeding on August 3 was almost certainly withdrawal bleeding caused by Unwanted 72, not your real period.
Unwanted 72 contains a large dose of levonorgestrel (a synthetic progesterone). This sudden hormonal spike followed by its clearance from your body can cause the uterine lining to shed partially and irregularly. According to Harrison's Principles of Internal Medicine (22nd ed.), side effects of levonorgestrel emergency contraception include nausea, irregular vaginal bleeding, and fatigue. This type of bleeding is expected and does not confirm or rule out pregnancy.
Levonorgestrel-induced withdrawal bleeding is typically:
  • Lighter/scantier than a normal period
  • Shorter in duration
  • May come earlier or later than expected

Why Does Your Nausea Start Now (August 6-9)?

This is the most important part of your question. There are three possible explanations, ranked from most to least likely:

1. Delayed Side Effect / Hormonal Disruption from Unwanted 72 (Most Likely)

Unwanted 72 causes a significant hormonal disturbance. Nausea is a well-documented side effect. According to Berek & Novak's Gynecology, nausea and vomiting occurred in a significant proportion of women using levonorgestrel emergency contraception. Even though you took it weeks ago, your body's hormonal cycle can remain disrupted for 4-6 weeks afterward, and nausea can appear as your hormones try to normalize.

2. Stress / Anxiety

Worrying about a possible pregnancy is itself a powerful cause of nausea, fatigue, and other physical symptoms through the gut-brain connection.

3. Early Pregnancy (Less Likely, But Cannot Be Fully Ruled Out Yet)

Unwanted 72 has a 1-3% failure rate, so pregnancy is possible. However, your two negative HCG tests on August 3-4 are reassuring. The key question is: when exactly did you test?
  • HCG (pregnancy hormone) only becomes reliably detectable 10-14 days after fertilization/implantation
  • If sex occurred July 16-19, fertilization could have happened around July 16-21 (assuming ovulation was near)
  • By August 3-4 (approx. 15-18 days later), a urine HCG test should have been able to detect pregnancy IF you were pregnant
  • Two negative tests at that point are a strong indicator that you are not pregnant
The scanty bleeding on August 3 further supports that Unwanted 72 was working and no implantation occurred, though light "implantation bleeding" can rarely be mistaken for a period.

What Should You Do Now?

  1. Repeat a urine pregnancy test today (August 9) - This is the single most important step. By now, any pregnancy from July 16-19 would produce clearly detectable HCG levels. A negative result at this point is highly reliable.
  2. If the test is still negative - You are very likely not pregnant. Your nausea is most probably from hormonal disruption caused by Unwanted 72 or stress.
  3. If the test is positive - See a doctor immediately for a blood HCG test and an ultrasound to rule out ectopic (tubal) pregnancy, which can be dangerous.
  4. Watch for warning signs requiring immediate medical attention:
    • Severe one-sided lower abdominal pain
    • Heavy abnormal bleeding
    • Shoulder tip pain
    • Dizziness or fainting
    • These could suggest an ectopic pregnancy even with a negative urine test
  5. Your next true period may come later than usual (possibly late August or early September) because Unwanted 72 commonly delays the next menstrual cycle by 1-2 weeks.

Bottom Line

Your nausea is most likely a delayed hormonal side effect of Unwanted 72 or stress-related. The light 2-day bleeding on August 3 was most likely a withdrawal bleed from the pill, not your period. Your two negative pregnancy tests are reassuring, but repeat the test today for final confirmation. If negative again, you can be confident you are not pregnant.
Disclaimer: This is for educational purposes only and is not a substitute for a consultation with your doctor or gynecologist.

From July 16-19 I have had unprotected sex and consumed unwanted 72 , my every month expected menstrual date is 2-3-4 and I got bledsing on 3 august for 2 days that was scanty and checking for HCG pregnancy kit for 2 days (8aug and 9 aug )that is also negative but from 3-4 days I fell nausea why

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