hi wondering if someone can help me. i had sex 13 days ago. my period is ALWAYS every 24-28 days every month. and this month i am late. today is day 29 and no period. i am trying to get pregnant and have not used protection for the last 3 yrs. i started spotting today..lightly brown and a small bit of reddish. do you think its my period or could i possibly be pregnant?