So if I understand it, you re-registered a name you had before, but lost. Your former blog would reside on the hosting that held it previously. Is this hosting still active? If so, you may be able to point to it via your DNS settings on the domains.
If the hosting was shut down you may not be able to access it again (only the hosting provider can advise you on this). While it is possible to restore or post from written copy, it is a time-consuming scanning task at best. I would check with the hosting provider as soon as you can.
I hope that helps,
Thomas D. - GoDaddy | Community Moderator 24/7 support available at x.co/247support