Vibrating Chest?

Date: 1/3/2018

I woke up one morning and heard my alarm go off, meaning it was time to get up. I sat up on my bed and felt something weird on my chest. It was vibrating, but I couldn't see anything on it. I put my hand on my chest to stop it, but it wouldn't and I was scared to get out of bed. Mr. Mike (my mom's boyfriend) went to check on me and I told him that my chest was feeling weird and I was too scared to go to school. Eventually, I woke up in reality as my phone alarm went off and I turned it off. Appearantly, I was laying on my phone.