Possible to be pregnant

May possible po kaya na mabuntis po ang isang babae kahit nagkaroon siya ng menstruation three days? Nag sex po kami ng asawa ko itong december 31. And expected date po ng period ko is january 11,12,13 (nagkaroon po ako january 05, three days only) and as of now, always po may lumalabas saakin na white blood tas may pag ka yellow. Feeling korin po is preggy ko, may crampings po ako sometimes, laging gutom, laging pagod gusto matulog. May cases napo ganto ung friend ko, which is nagkaroon daw siya ng menstruation, then nalaman nya three months pregnant nadaw sya. thank u po sa sasagot and pls respect po.