A Passover Guest?

Here's a good one. I was born and raised Jewish and celebrate Passover as per tradition. For those not familiar to the story. Jewish people do not eat bread or any bread products for 8 days each April due to the suffering of their ancestors.

I had been so busy this week that I had forgotten to cleanse my house of all bread products as the tradition implies. There was a big bag of cookies (non-kosher for Passover) that I left out on my desk from before the holiday started. Slipping my mind that it was now Passover, I ate some out of this bag last night before bed. Thought nothing of the fact it was "cheating".

Fast forward to 5AM, I wake up to a bright light and a very mysterious sound. The sound was like a ringing in my ears, but a different kind of ring. It was almost like someone was blowing a tinny, high-pitched whistle in my head. Really can't explain it beyond that.

The light was from my PC computer screen. It was still pitch dark otherwise. I had closed my monitor at bedtime and the only way for it turn on would be for someone to sit down, turn the monitor box on which requires a bit of physical force, and then physically move the mouse at my desk. I live completely alone, and there was no external force that could have got the screen open. It made me sit up and definitely got my attention.

The first thought that came through my head is that this is a warning. I checked my heart rate, checked my throat for any possible obstruction. Nothing out of the ordinary, I'm fine.

Then I remembered the night before eating those cookies. Now it makes a lot of sense. It's possible that since my family was together for a seder meal, that this was a family member just checking in to remind me to keep kosher. Is that possible? Has anyone had that kind of whistling or ringing in their ears before as the sign of someone's presence?