hi. just wanna ask ur opinion guys. i was kinda confused...on june last week i had my period but last only for 4 days i usually have a 6 or 7 days of period per month..da next month july i did not have my period i took da PT bit it was negative..until on August i dont have my period..its unusual because i dont missed my period every month..i took again the pregnancy test but it was still negative...then on today Sept.1st i have my period...i was thinking maybe i was pregnant?could pregnancy test be 100% accurate?plz help me..tnx