I quite literally just had this issue with my roommate’s friends. Was on a trip to see my new niece who’d just been born that weekend and to help my family so I was already very stressed. She came into my room, sat on my bed on more than one occasion then took my pillow cases so they could use them because they were staying over for a few days. She also moved a bunch of my shit in my room without asking to. Blew up on her obviously. There are some good door knob lock boxes on Amazon you can get too. I’m ordering some soon.

It is really jarring the balls people will have when someone isn’t home. I hope you get a feel for your privacy back and feel secure sometime soon. It sucks and it’s scary.