I have been married to my husband for 3 years, but I'm not sure if he's my child's father.

I broke up with my ex and married my husband in a month. (I knew my future husband for 7 years before we started dating.) About 2 weeks after I got married, I found out that I was 6 weeks pregnant. It seems possible that my ex could be my child's father. I don't have the heart (or nerve) to tell my husband, and have been unable to find my ex because he moved, although I have looked for him.