Possible Pregnancy: Period Delay & Symptoms - Expert Advice

Question
i had a period on may 31 2006 and now it is june 30 2006.  I have never in my life missed a period.  and i always start every 22 to 26 days.  Is It possible that i might be pregnant.  I have had unprotected sex during that time.  I have lower back aches and headaches quite often now.  Please respond and tell me your opinion and also if i would take a pregnancy test would it show positive as to i would have got pregnant around the 9-15 of may.  Would it have time to show up yet?  Thanks for your help and please respond quickly if you can.  much thanks and appreciation.  

Answer
If your last perod started on May 31, you would have ovulated on June 14 and could have conceived if you had sex on June 13,14,15, or 16. If you did become pregnant at that timie, a pregnancy test would not show a positive test until 14-21 days later. The best time to take a pregnancy test is seven days after missing your next period.