He was wearing a condom, I have still not had my period.

Hi,
Welcome to ehealthforum,
Since condoms are known to have failures, chances of pregnancy cannot be ruled out completely (especially if you have had late ovulation). The delay of 10 days or more in periods could also suggest pregnancy possibility. Do not depend on appearance of symptoms alone to suggest pregnancy possibility. Few women can experience all the symptoms, whereas few women do not experience any. If periods have not started within 10 days of expected period dates, or if you have got abnormal periods, or if you suspect chances of pregnancy, 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). Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest.
Take care.