i-pill within half an hour expectin her periods on 1st..but

Hi,
Welcome to ehealthforum,
Sperms can stay alive for 3-5 days inside you and egg once release can stay alive for 6-7 days. If she has had an early ovulation chances of pregnancy are possible. The chances are high if you did not use protection and if she is not on any regular birth control measures. If she has not got her periods within 10 days of expected period dates, or if she has got abnormal periods, or if she develops any new symptoms, or if you suspect chances of pregnancy, she should consider visiting your doctor/gynecologist for thorough examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). If pregnancy gets ruled out and if you intend to remain sexually active, you should consider getting her started on suitable regular birth control measures to be protected (after her periods). She should be regular with birth control use as instructed. Avoid having unprotected sexual contact.
Take care.