Are you sure that he is not a she? Doesn't look bloated if it's a female with eggs. Does your frog swim/eat normally? ACF rest at the top of the water often, if you touch him on the head does he retreat to the bottom of the tank (or bite you like mine would lol)? When you say his claws are clamped shut do you mean he cannot use his back legs? That may be signs of a stroke.. what is your water temperature and what do you feed your frogs?

The little white worms are probably harmless planaria, I think most tanks get them.. I have little water fleas and planaria in my tank I notice now and then but it's not a huge deal.