Seems like derealization. When you have heavy feelings of anxiety where you're questioning existence, etc and everything feels very scary... that's usually what people call it. Like, if you go watch some new age, existential stuff on YouTube I wonder if it would trigger it too. Not that I'm encouraging this, but that's kind of how it works. I'm not sure if you've experienced high levels of derealization before (like so-called ego-death for example) but it's fairly common I think. Just something to be aware of since it's extremely uncomfortable.
Here's what I think... derealization results from cognitive avoidance. It's dissociation. A person attempts to question every aspect of reality in order to find an "answer" to their anxiety. They seek some kind of understanding that will allow them to feel better. The trick lies in realizing that this kind of cognitive "digging" doesn't really go anywhere. There is no "answer" to your anxiety... especially not in your own head.
The more you try to go away from anxiety the more your brain will increase the alarm in your head and you'll feel more uncomfortable.
Basically, I think most of this philosophical stuff is garbage... it's a form of cognitive avoidance. If you're sitting around questioning whether our universe is a virtual reality construct created by some kind of hyper-dimensional self-aware singularity
you're cleverly avoiding thinking about real, physical issues in life... and that's the whole point.