H4 pending with previous H1B revoked

Urgent! Need your help

My husband transferred and got approval for his new H1b while my h4 COS is still pending with old H1B. Today, we received a notice that his old H1B has been revoked on February 10th. What I should do now? Can I apply h4 extension online to get the receipt right away? When I try to fill the new 539 form, it asks me my current immigration status, which is pending h4. but it doesn’t have this choice in the drop down list. Can I just select h4 status even it is still pending?

Any suggestions? Need to file ASAP to make sure won’t have any illegal present in US.

Thanks!

You can apply H4 online and provide the status as H4.