How to use Lutein to induce menstruation?

Lutein in the form of sublingual tablets should be used sublingually. Do not swallow the tablet, just wait until it dissolves under the tongue. The preparation we are talking about is Lutein sublingual tablets: https://www.gdziepolek.pl/produkty/45327/luteina-50-tabletki-podjezykowe/apteki With the help of our portal for prescription drugs, you can check the availability of the drug and make a reservation at the pharmacy of your choice. The dosage should be determined individually depending on the indications and response to treatment. What dosage did the doctor determine? According to medical data: "In menstrual disorders, 50 mg of progesterone is used sublingually 3-4 times a day. In menstrual cycle disorders, premenstrual syndrome, progesterone treatment is continued for 3-6 consecutive cycles." If the absence of menstruation before the use of the drug was not caused by pregnancy and this was excluded, then, most likely, the appearance of menstruation will also exclude pregnancy. I do not know if I understood your question. If it is not possible to visit a doctor, I encourage you to use the teleadvice offered, m.in. by the Gdziepolek.pl portal: https://www.gdziepolek.pl/telekonsultacja

Do @Як можна викликати місячні раніше? В мене запланована поїздка на море!:

I understand your fears about menstruation during a trip to the seaside. Please remember that trying to manipulate the menstrual cycle on your own can be ineffective and potentially harmful to your health. The best solution is to accept the natural rhythm of your body and prepare properly for different scenarios.

The best and safest way to speed up menstruation is to visit a gynecologist. Your doctor may prescribe hormonal agents to help adjust your cycle. If you are not able to make a face-to-face visit, I attach a link to the online teleconsultation:
https://www.gdzi epolek.pl/telekonsultacja/z-ginekologiem

How can you get your period earlier? I have a trip to the sea planned!

I used from the 15th to the 25th day of the cycle under the tongue 2 times a day. Up to 7 days should appear menstruation.

Up to @Wiktoria: 9 weeks after intercourse is enough time to determine pregnancy. Don't worry, you can rule out pregnancy.

And was 9 weeks enough? For blood tests and ultrasound, or rather I can still have doubts

In that case, please exclude pregnancy, the reason for the delay of menstruation is rather different.