If you look at your site through the error console of your browser, you might see an 403 error for the url requested by the ads. This means your ads are not approved yet.
The approval of an AdSense account does not automatically include your hosted domain. If you requested the approval of your own domain, you are asked to include ads into your site, so AdSense can review it. This can take a few days to over a week.
The only thing you can do now is to check if your ad code is inserted correctly. Just compare the code you got from AdSense with the code your browser displays.
As hard as it is, you must be patient now.