You can register .ro domains and every Romanian extension (.com.ro, .info.ro, .org.ro, .store.ro and more), plus international ones such as .com, .net, .org, .e...
Start by checking whether your DNS service provides a change history or a restore option. If you have an earlier export of your DNS zone, use it as a reference, but check that the values are still current. Avoid replacing the entire zone without checking which existing records are working.
If you have no copy, ask your website, email and other service providers for the records they require. Recreate only confirmed records, using the correct name, type and value. Do not guess IP addresses or mail destinations. After saving, test your website and email separately; DNS caching means changes may become visible at different times.