The odds of it being the ex-bfs are like, say, zero.
Definitley not the ex's baby. The lasted you would be due, I believe, would be July, if it was the ex's. You should have nothing to worry about.
Hon it is not your ex's! Congratulations!
I conceived in November, and am due next week.. so no, I would say that unless you are due in the next month, then it is a no way.
Definatley not your ex's. I conceived in Feb and am due in November. So dont worry especially since you have had a period since November.