Server does not exist

I tried to log into my server today and on Minecraft and it said server not found so I tried loading it up like I normally do and wait in the queue. The website looks different to how it did last time I played (which was a few months ago), so I assume there's been an update. I logged into my account via google and it said to create a server, yet I already had one for my friend and I to play on together. I currently do not know how to log into my server or even start it up, since I am the host.