Pregnancy confused

Hi doc and friends, gusto ko lang mgtanong, we had been done sex w/ hubby a day before nagtake Ako Ng diane pills, 1st time kong ngpills, expected regla ko Po noong Dec 7 pero nadelayed Ako (sakit puson at balakang ko) Hanggang kahapon Dec 13 niregla Ako pero may kakaibang lumabas sa pwerta ko, possible bang buntis sana Ako pero Hindi nadevelop? Salamat Po kung may magandang sagot..