Struggling with reality

I'm not sure where it the best place to post this but I am really struggling lately. I feel like I'm in an episode of twilight zone, or that everyone around me is gaslighting me or something insane. My reality isn't the reality everyone else is perceiving and I know that should be common sense but what I mean is I KNOW I said or did something very specifically and with intention, and then others around me say that what I remember doing or saying is not correct, even if it just happened. It's making me feel very depressed and isolated, it makes me feel stupid or incapable of understanding the world as it actually is. It is causing me to have a lot of self-worth issues again and I really don't know what to do to make the situation better. It's not like I can record or journal every single waking moment of my life, that's not realistic. I just don't know what to do to feel normal, to feel like I can trust my reality, or myself, or the people around me. Instead of feeling like I am living in some weird upside down universe where things make sense to me and nobody else...