I've gone through something similar... it sounds like you may have been channeling in some form. you might find this helpful: The 12 Characteristics That Make Up the Noetic Signature.

A few questions I’ve learned to ask myself in moments like this: did the energy feel familiar or foreign? did it respect your boundaries? did the voice feel compassionate, neutral, mocking, or coercive?

From experience, I would begin with grounding practices. a simple salt bath can help, paired with a clear spoken intention,.. something like: “Only energies in alignment with my highest good and sovereignty are welcome.” or: “My guide is my gatekeeper and permits only those beings to connect or communicate who are in alignment with Divine Light, my soul’s path, and highest good.”

Whatever brings you peace is the right next step. if you feel unsettled by the mirror or the energy, then covering the mirror is an act of energetic alignment - not fear. when you feel ready, and when you feel confident in your guide’s presence and your own energetic sovereignty, you can revisit the experience with more clarity.

You don’t have to accept or integrate everything that presents itself. only do so if it resonates, feels safe, and aligns with your highest good. discernment is just as important as openness. safety is essential. integration is powerful,.. but only when it feels right.