Delayed Period After Possible Conception: What Could Be the Cause?

Question
i had my last period on Nov. 10, 2004 then i had sex (with ejaculation) on Nov. 15. i believe i am safe that day. but this month i still dont have my period. i am 1 week delayed now. do u think i am preganat? by the way, on the last week of november i started taking laglutatthione and vitamin C. do u think it affected my cycle?

Answer
If your last period started on November 10, you would have ovulated around November 23 and could only have conceived if you had unprotected sex on November 22,23,24, or 25. It is highly unlikely that you could have conceived if you had sex five days after your period started (November 15). You were due for your next period on December 7. By now a pregnancy test will be accurate.  The medications you took would not affect your cycle.