After finishing Regestrone (norethisterone), it typically takes 3 to 10 days for withdrawal bleeding to begin, though it can sometimes take up to 14 days. Because you have PCOS, underlying hormonal imbalances can occasionally delay this response. Since you have confirmed you are not pregnant, please be reassured that this delay is common and not a cause for alarm. I suggest waiting another 5 days. If your period still hasn't started after a full two weeks post-treatment, please consult your gynecologist to discuss the next steps.

Yes, you generally need another emergency contraceptive pill because yesterday?s pill will not protect you from today's unprotected sex. Regarding your period delay medication (usually norethisterone), it can interact with certain morning-after pills. If you take levonorgestrel, it is generally safe to use together, but ulipristal acetate can make your period delay medication less effective and vice versa. I highly recommend speaking with a pharmacist or doctor right away to choose the safest option for your specific medications.

Since you started your daily oral contraceptive pills on the fourth day of your bleeding, the medication became effective immediately to protect you. Additionally, because you have taken your pills correctly every day and your partner did not ejaculate inside you, your risk is minimal. Keep taking your daily birth control pills at the same time each day to maintain their effectiveness. If you ever feel anxious, a simple home pregnancy test in two weeks can offer extra peace of mind.

Since your hormone panels and ultrasound are normal, there is likely nothing serious to worry about. Sometimes, a thin uterine lining means there is very little to shed, resulting in only minimal spotting after taking Regestrone (norethisterone). Withdrawal bleeding can also take up to 10 to 14 days to fully appear. I recommend waiting a few more days and consulting your gynecologist. They can help determine if lifestyle factors like stress or diet are playing a role, or if a different treatment approach is needed.

Transitioning from Regestrone (norethisterone) to Dronis 30 (ethinyl estradiol/drospirenone) often causes temporary breakthrough bleeding as your body adapts to the new hormone levels. Trapin MF (tranexamic acid/mefenamic acid) helped control the initial flow, but this new spotting is a common adjustment response. Your 4cm ovarian cyst is likely being managed by the Dronis 30, which helps regulate ovarian activity. Please continue taking your Dronis 30 as scheduled. I highly recommend contacting your gynecologist so they can evaluate this bleeding pattern and monitor your cyst with a follow-up ultrasound to ensure everything is resolving safely.

Since you used protection, the risk of pregnancy from pre-ejaculatory fluid is very low. Please take a home pregnancy test first to get a clear answer. Please do not take Regestrone (norethisterone) or Cytolog (misoprostol) on your own. Regestrone will not safely start a period if you are pregnant, and Cytolog is a prescription medication used for termination that requires strict medical supervision to ensure your safety. I highly recommend consulting a gynecologist who can guide you safely based on your test results.