Lucid dreaming following meditation

Just wanted some input from others about a dream I recently had.

Was having trouble falling asleep and decided to meditate. I can't remember the mantra, but I sometimes practice metta meditation or another one focused on clearing my mind.

Suddenly I floated out of my body and into the bedroom. Everything was black/white/shadowy. I could hear my mother-in-law in the next room waking up and my boyfriend next to me getting out of bed (neither of which happened).

I kept calling out to my mom (who has recently passed) yelling out I was sending her my good merit. All the while, I was tumbling and flying into random space and I forced myself to turn and I woke up to lightning and thunder. It felt very unsettling.

Has anyone experienced this following meditation?