Auto walk, jump and crouch. Unable to move.

I have spawned both on land and in the sea and I auto walk and crouch despite researching this, there seems to be no fix and I can not play on this latest version. I can not overrule the auto walk, crouch or jump. Please solve this I have just spawned next to from what I can see a shipwreck and I am extatic to explore such when I have the chance.  Thankyou - Jodie