Stuff in the room

I've been seeing weird stuff again recently.

Dark or bright shadows moving around, bright orbs.

Last night I saw the reflection of what looked like a grayish-brown bird flying past. The room was lit, but behind the balcony it was pretty dark. Balcony windows were closed. I saw the reflection on laptop screen. Due to the angles and lighting, it would've been physically possible only if the bird were in the room. When I looked over the shoulder, I couldn't see anything.

Sometimes the lighting in the room becomes darker, sometimes brighter. As if something shadowing the ceiling lamp.