Illness/Sickness: Axie death roll

[kapooey]

This is how it goes....so Hika was in the tank, all in a sudden she start swimming like crazy and hit the glass and the fish tank is full of blood.....I took her out and place her in a container and I saw she got a little tiny blood on her tail. When I start changing the water in the tank she starts doing the death roll and splash water everywhere. So I put her in the fridge....I don't know what should I do next...