My Betta, Roy, had a really bad case of fin rot and cloudy eye when I got him and he's finally off the medication.
The only thing is whenever he swims, one of his side fins goes really fast and the other one barely moves. And they he seems to trip over himself, like he can't get his back fin to work so he seems to flop over to one side a lot and have the fins cover the front of him. Then sometimes he bends in on himself and just floats there for a couple of minutes. He also doesn't react really quickly to my movements. I waved my hand to him at different speeds so he could react and he didn't even swim away when I waved extremely fast.
It's definitely not normal behavior, he's a ton better after the medication but this is different from how he was acting when he was extremely sick... I just need to figure out why he's "flopping around" like this.