It's hard to know whether a dream represents a memory. You have to be careful. The safest thing to do is to stay on the level of "what the dream means to you," in other words exploring how it relates to present-day feelings and thoughts. If it's past trauma that is unresolved, the effect of that is sure to come up in the present, so you are not ignoring it.

We might be able to say more if you feel comfortable describing in a bit more detail what actually happens in the dream. Only if you are comfortable.