¿Estoy embarazada si no tengo el período después de tener relaciones sexuales sin protección?

Avoid taking albendazole­ when menstruating. It may mess up your cycle­. However, you can take it if pre­scribed. Your doctor understands the risks. The­y'll tell you how to manage it safely. Discuss any he­alth issues with them. Get advice­ on taking albendazole during periods. 

The taking of any medication during pregnancy should not be done unless it is recommended by a doctor. Principle Ferite tablet includes an iron supplement that is perhaps beneficial and not useful for a woman in the 4th week of her pregnancy. The safest option before using any medication during pregnancy is to contact an obstetrician or gynecologist for a recommendation.

Irregular periods can have various causes, and taking medication to regulate them is a positive step. However, even with regular periods, occasional variations in timing can still occur. It mostly happens in maximum no. of women. if you feel you're experiencing pregnancy symptoms it may be a good idea to take a pregnancy test to rule out the possibility of pregnancy.

No, TB tests and X-rays are not the methods used to detect pregnancy. 

While it's less likely to conceive right after having your period, it's still possible to become pregnant at any point in your menstrual cycle, including during the days immediately after your period. 
If you've had unprotected intercourse and missed a period, it's important to consider the possibility of pregnancy and take a pregnancy test to confirm.