Hi Shaz,
Thank you for your comments, and for your concern! Please don't worry; I'm glad you took the initiative to share your worries with me--though please do remember, I am not a licensed therapist; my opinions are personal, not professional.
Regarding your dream--I can't formally analyze it, but I do think it's likely to do with all the thoughts you've been having about self-harm. Our dreams are often a mixture of memories (recent or distant) and the things we've been thinking about, both consciously and subconsciously. So it's not surprising to me that, having thought about self-harm, you dreamed about it. Even though your past self-harm didn't cause any permanent damage, that doesn't make it not "real" or insignificant. And if you're thinking about it again now, it seems like it had an impact on you--maybe more so than you realized at the time.
I think it's important that the wound itself in your dream was frightening to you; to me, this sounds like it could be reflecting your worry about the situation, like you don't really want to give into self-harm even though you've been thinking about it. It's often the case that the harm itself isn't what we're after, but whatever relief we may find follows after. So this is a good sign, to me; it's good to not want to hurt yourself!
If you're worried about your dreams, you may want to speak to a therapist that specifically has some experience with dream analysis. Even if not, however, it may be helpful to you to reach out to a therapist to talk about your thoughts around self-harm—it's better to head these things off early, if you can, than wait until they get worse. Here's our resources page; there are some links and phone numbers here that might help:
https://www.healthyplace.com/other-info/resources/mental-health-hotline-numbers-and-refer…
If you have any more questions/comments/concerns, don't hesitate to reach out. I'm here to help however I can. :)
Sincerely,
Kim