So my periods are a little irregular nornally, lasting anywhere from 35-45 days apart normally lasting about 7days. I had gone to my yearly obgyn appointment, period was still late at the time. About 4 days after I had a light period that lasted about 4 days compared to normal and since then I have been having the same sort of light period every 12-13 days. Could I be pregnant? Or something else be wrong? Really not sure.