Sorry to hear that...but don't give up. Stuff like that happens and all you can do is learn from it.
I recently had to kill one of my tetras cuz it just wasn't gonna live much longer. Today when I came back from three days of hiking, I discovered that another one has the same problem. He's gonna have to go too soon.
But that leaves more room for you to explore other fish options.
I ended up with a puffer cuz Kissyboots (the fish) died.
Hope everything else is ok.
