That reminds me of my poor red devil. At first he would have fits of flipping around, and swimming in circles with his nose pointed down. By a few hours later he would be fine, and begging for food. That went on for 2 weeks. But then he went down hill, and started spending all day everyday having what looked like epileptic fits. It was swim bladder, and I ended up putting down when he stopped eating altogether and could only lay on the bottom breathing. I hope your fish gets better, but if it is swim bladder I have a feeling he will soon be like that all the time.