so i was on birth control and i once i got off my period stopped completely. i ended up not having my period in over a year. well me and my husband had unprotected sex and i wasnt sure if i was pregnant, so i went to the doctor where they did a blood pregnancy test, it came back negative, well now two weeks later i started what i think is my period. why would my period kick back on now, or could i be pregnant and the test just had been to early?