advice wanted as well. mom invading space and searching me at 18.

idk if this belongs here but just a moment ago my mom came up to my door and said give me your cart (thc vape) and i didnt have one, i said "i dont have anything what are you talking about ?" and she was about to come in and i told her i was changing and she says okay and then comes in anyways. made me pull my pants down to see if i was concealing said cart underneath and nothing. i complained and said thats not okay and very invasive. she said its her house and its "one of her rules" and she threatens to kick me out if i attempt to not let her cross these boundaries ive tried to set of searching me in public, patting me down, asking me if im high allll the time and calling me a liar if i say im not, tons of stuff. and she doesn't listen or care. any advice?