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 wasn't 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?

No idea, periods seem to have a mind of their own, where you regular or not before you did pills.

Some women are not regular at all.