Breaking in dreams..please help.?

So I usually have these dreams. I'm not sure how long its been going on but I know its been a month or longer. It usually starts out with me about to go to sleep and I go in the kitchen to find the backdoor open. Its usually chilly out so I go and close it and almost everytime, somebody fights to come back in. So Im trying to push close and they try to push in. I hate it. Almost everytime I am able to close the door on them but I have had a few encounters where they got in and we fought. Last night, they got in and it was some white girl with blonde hair and she had a knife and we has fighting. Luckily I screamed enough for my mom and she came down. I don't know whats going on..what do you think??