Annoyed

How do you deal with people annoying you during your pregnancy? My husband 3 year old and I live with my parents. We are remodeling. Anyway my 20 year old brother also lives here. Without a job. Uses all my stuff. Tooth paste, my husbands shampoo, and body wash, my detergent. I even hide this stuff and he still uses it somehow. He has all this money saved up from his old job... And he has the nerve to ask me for gas money because he doesn't want to touch that money. I was like well I guess your gonna have to aren't you. Its annoying. Not only that but he is the loudest person I have ever met. He stomps and I mean stomps through the house. He yells when he talks. He is rude and has this i know everything attitude. Won't even look for a job after being fired from his first one. Doesn't help do anything around the house when i do all the cooking and cleaning. He just leaves dishes everywhere.. Tracks mud through the house with his stupid boots. And uses my Netflix Account. I CNT handle it. My hormones are going crazy and I want to snap. I have almost cried today because he is annoying me so bad. I won't even come out of my two rooms because of I do I'm gonna lose it.. He threatened to throw my puppy outside if he touches him. I said you can't put him out he just had a bath and is still a little damp and its freezing. He said I don't care I'll do it! Who says that about a puppy? He was just trying to play. I cant deal with it. How do others in multiple family homes deal with being annoyed by family members while pregnant?