Blimey, another one?
All these cars all with various manufacture dates and the same issue?
Is it the cold weather?
I would think that if it's a relay it should keep going once started, at least that's how mine has been, but I might be wrong.
When you say "I tried to turn it over again but nothing" do you mean it isn't turning over, or it's turning over but not starting.
If it is turning over but consistently refusing to start, with the ignition on go and tap the tops of the two rectangular relays in the engine fuse box. (one is fuel pump/coil pack and the other is radiator fan)
If it then suddenly starts, maybe it is the relay?