Hi, get urine Pregnancy test first then if negative or positive meet gynaecologist . if negative wait for another 5 days and repeat pregnancy test again and take withdrawal medicine for periods under gynaecologist consultation.
Well unprotected intercourse might lead to pregnancy also...apart from that even hormonal causes , stress, will cause alteration in your menses and for few women its common to have postponement of periods by few days..for that I need to know your menstrual history...
you can meet a gynaecologist and also get a urine pregnancy test done at home only to rule out pregnancy..
please use contraception do as to avoid in wanted pregnancy...thank you
Get your cousin's urine pregnancy test done. If it shows negative result, repeat the test after 2 weeks. If it shows positive results, consult a gynecologist for further evaluation and treatment.
You can also visit my clinic International Fertility Centre located in New Delhi for further evaluation. My clinic offers varied gynecology treatments and services to help you have a successful treatment. You can mail me your contact details so that I can get in touch with you.