Welcome to the forum! 
It’s possible it was your mind processing your memories, but you have have memories forwards as well as backwards in time. Only you can say but I recommend starting a dream journal to keep these fresh, and you can look back through it from time to time and see what things mean when you have more info.
Check out our Divination, Dreamwork & Prophecy category for info on doing dreamwork, I really enjoyed the book Dreamgates by Robert Moss for teaching on how to work with dreams.
Please do let us have your Introduction HERE [ ← click me! ], which we need per the forum rules and see our posting guidelines in the FAQ.
Points to cover:
- Where are you from?
- Do you have any practical experience in magick?
- If so, what exactly do you practice and
- How long have you practiced?
- What are your areas of interest?
The getting started guide with all forum orientation stuff, links to tutorials and popular megathreads are here: GETTING STARTED GUIDE, Rules, Notables, Tutorials and References. The links in that megathread are forum-made tutorials for things like spiritual hygiene, developing your astral senses and avoiding impostors and parasites… When you can be sure you’ll not get attacked by parasites, then try Unofficial Tutorials: First Contact from Sigils to Evocation Collection.
For reference:
The rules are here - please read them.
The posting guidelines are here in the FAQ
The Terms of Service are here