Using a phillips head screwdriver tighten all door hinges so that none is loose.
Fix bedroom door latch.
Now try closing the door and give.
Check on the bottom hinge as well of course.
Is the top edge parallel with the top door jamb head jamb.
Loosen the knobs a little to relieve some of the pressure on the door and to free up the latch a little.
Tighten the hinges first if you find that the latch contacts the strike plate too high or too low make sure all the door s hinge screws are tight.
Both hinges should be nice and secure.
It should be equally solid.
But if your door is dragging due to a loose hinge it s the top one that will cause the door to pivot on the bottom hinge and thus drag.
If that doesn t solve the problem try this trick.
Check the top of the door.
Tighten any that might be loose and then check the door again.
If not there is more to look for.