amnesia?

I have a vague memory of something bad happening to me. (which I didn't know was a memory until it was confirmed, I thought it was just some vague image in a dream/nightmare I had the night it happened.) Is this enough to be considered amnesia? I don't recall details, I don't recall where it happened (only an assumption), I don't have an image of who it was, I don't have any emotional memories connected to it, it's all extremely vague and shadowy/blurry. In all seriousness it's like it didn't happen. It wasn't real and it didn't happen to me. Is this amnesic enough?

I was told by another DID forum member that this is dissociative amnesia. I had an experience like this today where a memory about something that happened last night didn't seem real and I didn't have any emotional connection to it, kinda like I was watching a video someone showed me for the first time. The memory was triggered by my brother asking me about the moment.