Help! What could this be?

[Besta]

I got a betta fish about a month ago. Recently I noticed a bulge on her stomach and thought she may be bloated so I'm fasting her, although now I have noticed fin loss and wonder if it's a physical injury??
She is still very active but the injury/illness is looking worse than a couple days ago. I've been doing regular water changes and adding stress coat; is there anything else I should do? And what do you think this could possibly be?

[charliebankston]

Looks like hemorrhagic septicemia. If that's what it is it can only be treated with internally with food dosed with a broad spectrum antibiotic. Aquarium co-op, Aquarium science. Com, and Hikari have instructions on how to medicate food. It needs to be an antibiotic that treats gram negative and gram positive bacteria

[Besta]

Okay ill look into antibiotics right away and keep an eye on her! Thanks for replying!

[charliebankston]

Yw and good luck