unable to log on

I was editing my site when my computer crashed. I am now unable to log into my wordpress site. The name was https://www.collinsmufflershop.com and now when I try that I cannot connect to the site. I had thought about changing it to https://www.collinsautomotive&metalworks.com but that doesn’t work either. Please help me log into the old site. I am on a borrowed computer and cannot download any programs as I do not have admin access. I do have admin access for the old https://www.collinsmufflershop.com site.