So a few weeks ago I had a lucid dream. But within the lucid dream I had seen a mirror and when I looked into it I was scared. Very scared like there was something in it that I was terrified of. However, I had not seen my reflection and I realized I was still dreaming. Throughout the day that day I was also scared to look in mirrors but I have no idea why.
What did that mean? could someone help me, please?

PS. The next day after that I was fine with mirrors again.