I have a new Pacman. We got him 2 weeks ago. I gave him a warm bath last night and he kept getting on his back and swimming. I came home from work today and he was in his water bowl doing the same thing. Is this normal?

He is in a 10 gallon aquarium.
Around 74-76 degrees daily.
70 at night.
80 humidity.
i have seen him eat a couple of crickets and a worm.
If i dip his food in supplements he will not eat.