Can I challenge the pre-nuptial agreement because of duress?

My soon to be ex-husband never asked me to sign a pre-nuptial agreement until hours before our wedding. My parents had already booked a reception hall and I had many quests from around the country fly in for the wedding. He said he would call off the wedding if I didn't sign the pre-nup so I did. Now he is divorcing me. I signed the pre-nuptial agreement in another state. We have two elementary school children together.