Do you have any pictures?
How long have you had him?
With tongue sticking out it's usually MBD but it could be other issues as well, so taking it to the vet to get it check ASAP is not a bad idea.
Don't know, my horned frogs are very healthy but don't move around much, they'll stay in one spot for weeks on end. These frogs are ambush predators so it's their nature to stay put for long period of times. I think reason yours is moving around alot is because agitated/stressed.