Can't Use Transform Tools Properly Anymore?

Hey All!

I have a problem where whatever transformation tools I choose e.g move, rotate or scale it will only let me transform in one direction with “CTRL” button held down and that’s if I select a static mesh or something from the world outliner. If I do not select from world outliner and try to select an object from 3d viewport it won’t actually select the chosen item. Can anyone please help as this has literally given me a headache and now feel like I cannot trust the UE4 not to keep giving stupid problems! Thanks in advance!

Shot in the dark, did you by any chance set one of the grid settings too high?