There's not enough information here. When's your due date? How many weeks are you supposed to be? When was your lmp?
Also, it's best to be honest with both men and do a dna test to be 100% sure.
Lmp 1/28/16 im 7weeks i believe and i told my ex i dont know how 2 tell my husband although we had split up for a couple weeks
Most likely the ex. You should do a DNA test anyways
Tell your husband the same way you told your ex.
You would def need a DNA test to be sure.
With a due date of 11/3, it sounds like conception was around feb. 9-11, so sounds like the ex.
if your ex knows then get a DNA Test and if he is negative then you will know who the father is.