New plugins and theme edit DISSAPEARED

Hello!

I have a problem. I have a WordPress website that worked just fine until now. I even had 2 months of Adwords campaign. – http://reparatiicasetedirectieauto.ro

The problem is this: when I click Plugins I can only see the ones already installed. I cannot add new plugins or edit the one already installed.

I also don’t have the Edit Theme option in Appearance.

Now, I don’t know if it is related or not but, at the same time, my website disappeared from Google. I’ve started on page 7 with some specific words, and worked my way up to page 2. Now my site is missing from any page. When I try to Fetch as Google the rander looks like this:

My site doesn’t look like this.

Is these 2 problems related? Is it a virus? Should I do something with the site, or is it a hosting problem?

I don’t have a backup 🙁

Please help! Thank you!