i had a pill within 24 hours to be safe. I am delayed 10 day

Hi,
Welcome to ehealthforum,
The emergency contraceptive pills work in preventing pregnancy if it is taken within 24-48 hours of the unprotected sexual intercourse (provided you were not sexually active without protection after taking it). Withdrawal bleeding usually occurs within 5-7 days of taking the emergency contraceptive indicating that the pill has worked (which may not occur if the pill has been taken very close to your last menstrual period). Since these emergency contraceptives contain high doses of hormones, these can disrupt the normal hormonal and period pattern. Wait and watch for your next periods which can be delayed. If pregnancy is suspected, consider visiting your doctor/gynecologist at the earliest 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, further investigations would be needed to look for the underlying cause for your absent periods. Get started on treatment as indicated by your examination findings/investigation results to help you regulate your periods. If pregnancy gets ruled out, and if you are not ready for pregnancy, but intend to remain sexually active, consider visiting your gynecologist to get started on suitable regular birth control measures to be protected (after your periods). Be regular with birth control use as instructed. Avoid having unprotected sexual contact.
Take care.