What could be wrong with this fish?

I just finished treating the tank with API primafix for a fungus. Now I’ve noticed this Molly has a red mouth and bulged eyes. The Molly has also been a bit aggressive. What in the world is this? Ever since I bought the Mollys it’s been nothing but issue after issue. I also treated the tank a couple months ago with paracleanse due to them flashing and having white stringy poop. All of the other fish have been doing well. My other Molly had the white cotton like fungus on tail and now that’s gone after primafix treatment but now this other Molly has whatever this is! Help!!!