I've noticed if I get zapped by a spider or any of the monsters & don't die...my guy moves REALLY slow. How long does it take to recover to normal speed? I've tried eating & sleeping. That doesn't speed him up. If I quit the game & come back in, then he is at normal speed again. But how long if you just play & not quit the game?
That doesn't sound like it should be happening..... A cave spider maybe, with the poison status effect and all. Are you sure you're not in a cave and caught in a web?
If you are currently sprinting and get hit by a mob the sprinting stops, and you have to double click the joystick forward again to continue running. (I think that is the problem)
also just try drinking a potion of swiftness if the above wasn't the problem, i don't know what to tell you
I'm Guessing you are panicking and clicking the crouch button by mistake, Which is by pressing the thumbstick in.
If this is the case then you will see a figure in the top left corner indicating you are in crouch mode, I use to do it when i started playing, and could never work out why either.
also just try drinking a potion of swiftness if the above wasn't the problem, i don't know what to tell you
That actually sounds like a good possibility.