Suggest Treatment For A Delayed Menstrual Period With Negative HPT

hey, i did a home pregnancy test, it was negative but i am 12 days late for my period. yesterday i saw some light brown spots while urination but my pad is clean even today. just now i saw a red little spot for the first time. my period date was april,5. what should i do?i had a miscarriage 2009.now i have to travel abroad in a week. what should i do?