Fell and Can't Remember - Is This Normal?

falling and not remembering I went into a restaurant while my boyfriend was doing doordash to go to the bathroom. I deal with derealization depersonalization and have been having it alot lately. I started having it going to the bathroom and decided to go out to the car. It was like my mind just blanked and I zoned out while walking.. next thing I know I was on the ground and someone was asking me if I was okay. I got in the car and saw I had oil on my foot so put together I must’ve slipped on leaked oil from a car. I had an immediate bruise on my leg so I had to have fallen decently hard. I don’t remember falling and I didn’t even feel it until I got up. Has anyone else done this or is it normal? My blood sugar was low but definitely don’t think I passed out. I felt kind of weird and out of it after I keep forgetting what i’m typing and messing up words (but i’ve been doing that since last week after getting over covid and having brain fog). I know i’m also panicking and i’m a hypochondriac but it feels very odd to me.