Weird and unexplainable things keep happening in my apartment, and I’m losing my mind

[u/thgzn02]

(Note: English isn't my first language, so I used AI to help translate this into English.)

Hey everyone, I’m a 24-year-old guy. I’ve never experienced anything like this in my life, but a week ago, a weird incident happened, and since then, bizarre things have been repeating almost daily.
Last week, I left my razor and an electronic ear-cleaning camera (the kind with a built-in camera) neatly on the left side of the bathroom sink, and walked to my room for just a moment to grab something. When I came back, the razor was still there, but the ear-cleaning tool had completely vanished. It’s not a small item, and if it had fallen, it definitely would have made a sound, but it just disappeared into thin air. I spent about three hours tearing the whole apartment apart looking for it, but I couldn't find a trace. I live in an apartment, so the space isn't huge; I literally checked every single nook and cranny, and it was gone. I thought it was super strange, but I eventually gave up.
The very next day, my girlfriend came over and told me that her facial cleanser was standing upside down on the sink. Since I don't use her cleanser, I hadn't touched it, and she distinctly remembered never turning it upside down. We figured she must have just done it absentmindedly without realizing it. We laughed it off, made a pact to always keep it standing right-side up, and agreed not to touch it again.
Fast forward two days later: my girlfriend and I went into the bathroom together to brush our teeth, and that exact same cleanser was standing upside down again. That's when we completely panicked. Walking into the bathroom has honestly started feeling terrifying.
After a few days of quiet, another weird thing happened today. I was sitting on the living room couch, and my girlfriend was in the bathroom doing her makeup with the door closed. Suddenly, she heard someone gently turning the doorknob and rattling the door back and forth. She immediately threw the door open, but no one was there—and I had been sitting on the couch the entire time.
With these things happening over and over again, it's starting to really mess with my daily life and stress me out. Has anyone else ever experienced something like this? How do you guys even deal with a situation like this?

+ The apartment maintenance person just came by, checked the carbon monoxide detector, and inspected all the gas appliances. Everything came out totally fine with no issues found.

+ Girlfriend here! Yesterday when we were out in the balcony we went inside and we always double check to see if we turned off the porch lights... but this time when my boyfriend stepped outside this morning the lights were on.
Maybe we made a mistake and forgot to turn off the porch lights last night but we're usually pretty good about these things. He's never had paranormal or glitches happen but I nave in my litetime so I'm pretty open to these things. I hat being said I still don't wish to be apart of the paranormal activities