Be patient. Find out your problem. If there is no problem then you can wait. If there is any big mistake then you can edit or delete. And create new gig.
It is better that before publish gig we need to more and more research. Gig image, title, keyword, pricing should be unique. Be patient some days and try to find out your problem.
Check your gig to see if it is not active in search results. Then it will not come any impression. In that case you should wait a few days or you can contact to support team.
Keep these things in mind before publishing your gig
1. SEO base gig title
2. Positive keyword
3. Search tag
4. Attractive gig image
5. Gig image SEO
And most important should follow Fiverr guidelines.