A Strange Morning Experience

I was scrolling on my phone after Fajr, just lying in bed under my blanket, you know how it is. Suddenly, my feed got all serious and dark, showing historical stuff and scary facts. Then it switched to topics about sins, forgiveness, duas, and ahadith, and I felt this shiver down my spine. I thought, okay, this is hitting close to home, it's normal. But then, out of nowhere, my whole body started shaking like crazy, so hard that I could hear my teeth chattering. I tried to get up to go to the bathroom, but I couldn't even walk straight or stand properly. After using the restroom, I grabbed another blanket and got back into bed, now with two blankets, still shaking badly. I recited Ayat-ul-Kursi, and alhamdulillah, the shaking just stopped? I was left panting and trying to catch my breath, and now I'm all sweaty. (I really don't know what that was, can anyone help me understand?)