How can one get pregnant

Patient's question:

Patient Information: Female, 16 years old
Medical History (Onset time, main symptoms, etc.): Had menstrual periods on January 9, February 7, March 7, and April 5 in 2012. Took emergency contraception pills in October and early November 2011. Took it four times in 2011. Usual menstrual duration is about 5 days. Had sexual intercourse with her husband on April 15, both times with internal ejaculation, without using any protection. Today, there is a small amount of translucent fluid in her groin. She usually doesn't feel well and doesn't exercise frequently.
Question: Could she be pregnant?
Type of Help Needed: Please let me know if she could be pregnant. Thank you!
Medical History and Allergies/Genealogical History: None.

Doctor's answer:

According to your description, your menstrual cycle is basically 28 days, very regular. Your period on April 5th means your ovulation period is between April 14th and 23rd. You had sex with your husband on April 15th, which was during your fertile period, so the possibility of you getting pregnant is very high.
Advice: The possibility of you getting pregnant is very high. If you do not want to have a baby, it is too late to correct it now. I suggest you wait for a while to see if you experience a missed period, or take an HCG test after your period.
Thank you for consulting. I hope my advice brings you some relief. Wishing you good health!
This is the advice for the question "Help me check if I might be pregnant~". I hope it helps you. Wishing you good health!