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Thanks for contacting with your health query
1. Emergency
Contraception [like i pill] contains high dose of progesterone] which prevents or delay ovulation and tubal transport and if you inhibit or delay ovulation, then you are also extending the time when your periods will restart.
2. Make an appointment with a Gynecologist for examination and get on birth control pills [which are highly effective in preventing
pregnancy and promoting regular periods], however women can still be on the pill, not get their periods and still not be pregnant.
3. however one has to exclude other common causes which can delay regular period like:
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stress which disrupts the ovulation: since you are worried [under stress] which is causing your body to secrete more
cortisol which delays or stops ovulation altogether causing irregular periods
- Also diet low in fibre and high in saturated fats can cause irregular periods, likewise low
thyroid [hypothyroidism] can also cause the same, so check with your Doctor to get on a regular, safe form of birth control