Just wondering if anyone has ever experienced this.

So I’m fine until I get a crazy episode of disorientation, I can barely understand what I’m reading, balance is weird, and a great amount of disassociation. Just about feels like I’m dying. That passes then I have crazy brain fog and major depressive period where I’m kinda question what the fuck just happened. This happens to me every few months to varying intensities. Makes me feel like I’m going crazy. I got a doctors appointment coming up soon but still wondering if anyone also feels this or knows what’s up.