My name is ***** ***** I have been a Vet tech for 30+ years and a Fish keeper for over 40 years.
Is she able to right herself at all to swim?
Does she seem distressed?
My biggest fear is the swim bladder is damaged and if that is case it may not be able to be fixed. Swim bladder is a delicate organ and if ruptured there is no repair. At this point if the fish if thriving as it is then we may have to just let it be as long as the fish is eating and able to get around it may be wise to leave the fish alone. If the fish gets bad then the option would be to euthanize the fish. Hopefully the fish can recover some bouncy and be able to swim again and right itself. I am being honest with this because swim bladder injuries are hard to fix.
You are better with a 25%-35% water change is better so there is no ammonia spikes that can cause further issues, You did well removing the gravel to protect the fish. Make sure That you use some aquarium salt as a tonic. It does help ailing fish.
I suggest 1 teaspoon per gallon the first time. Then when doing water changes only put in 1 teaspoon full equivalent to the anout removed to go back in. I like strictly the Aquarium Salt. In some fish Epsom salts burns. When I have addressed your concerns, Please do not forget to rate my service.