I don’t think it is as simple as forgetting about it. I also have horrendous nightmares similar to the one that you had. What I would suggest finding something apart from a nightmare to ground you in real life. Whether it is a type of food that you like or a pet or a person who you really enjoy, Root that to real life. The dreams aren’t real, they are just your conscious being unkind. You got this.
Also by “I forgot about it bc of the presence of a close friend”, I really mean I shifted focus long enough to stop thinking about it, though that didn’t fit in the character limit. The dream was distressing enough that I woke up from it with a sore hand, so I’m pretty sure I was clenching it in my sleep
I know it’s not real, but I think the dream touched on something I’ve been working on in therapy for about two years now that really fucked with me. It’s the second dream I’ve had like it. It seems most likely it’s my brain deciding I’m in a safe enough place in life to start unpacking trauma, particularly something I can’t really remember. It feels like it’s a confirmation that what I think maybe happened DID happen which fucks so heavily with me