Hi Smidge, this is probably an emotional restoration dream. It reveals your emotions. The locking of the doors reveals your feelings, possibly because you want to give her what she wants (a locked door) or it reveals emotions not to allow her near you (locking her out). So this is not serious, just emotions that come out (is released) in a dream to restore your emotional condition.
A carpet speaks of comfort. There is no comfort at the moment because of the situation about California that you described and you really want to solve it for her (your mother) but it is difficult for you to do that. You really do want to support your friend. This is all about this situation.