Given these facts you may need to refile. But wait for the denial first. I do not recommend traveling while your application is still pending. My best advice is to consult an attorney.
Alexus P. Sham firstname.lastname@example.org (917) 498-9009. The above information is only general in nature and does not constitute legal advice. It does not create an attorney-client relationship.
NO don't leave the US.
RUSH the divorce.
Hire an immigration lawyer ... you might have to file a new I-751.
PROFESSOR OF IMMIGRATION LAW for over 10 years -- This blog posting is offered for informational purposes only. It does not constitute an attorney-client relationship. Also, keep in mind that this is an INTERNET BLOG. You should not rely on anything you read here to make decisions which impact on your life. Meet with an attorney, via Skype, or in person, to obtain competent personal and professional guidance.
Based on the limited facts you've provided, I would not travel internationally. Instead, I'd retain counsel to review the matter and all documents that you've been provided by USCIS.