help?

Ashley
Hey ladies so I have a question, I've not been on birth control since august.y periods stayed regular, last month I had two periods, the 4-9 then 24-29. My regular periods was the 4-9. The second "period"was light. I've yet to get my period this month. What could be the reason? Has anyone experienced this and later found out they were pregnant? 
Can someone help me please??