My domain is not resolving after updating its DNS records 10 hours ago.I bought the domain from GoDaddy and hosted it on a different server. They guided me to alter two domain entries: the first is an IP address, and the second is ab.example.com.When I go to example.com, it is giving me the following error: Webpage is unavailable. Pinging my  website ends up with a timed out error and 100% loss for 4 packets.It may be that I changed the nameservers three times in the last hour because of mistakes in the name. After that I set the nameservers to the default (NS77.DOMAINCONTROL.COM andNS78.DOMAINCONTROL.COM), and changed the A host record and CNAME alias as directed. 
What should I do after changing DNS records and my site is not resolving?
domains;dns;godaddy;nameserver