Dream About School Shooting Nightmare

I am am a teacher so the following is something I worry about a lot. The school was a weird mixture between the school I work at the my own Alma mater with my friends. The students at the school changed from my students at my job in the beginning, to a friend from college, to my friends from high school. The dream started with me at a convention or meeting talking to teacher friends and mentors throughout my life. I was talking to college recruiters who were trying to recruit me. I remember saying that I was coming to terms with realizing that I needed to give up on my dream to do my masters out of state because I already did that with my undergraduate degree. I was located in my home state of Florida, not Texas where I currently live. I was supposed to attend a choir rehearsal somewhere else and went to attend because I wouldn’t have made it to the high school on time. Something changed and I went to the high school. It was almost as if God was pushing me as if I wasn’t supposed to be at the school that day. When the dream and shooting situation began I saw one of my students who looked spooked. I had missed a few days of school and I asked him what was wrong. He said there’d be a shooting days prior when I wasn’t there. We went and sat in an office with an office worker and he started sharing details with us. The next moment we looked out the window to the playground and saw the flashes of gunfire. We froze for a second and then ran to find hiding places. I was screaming shooter and gun to the office workers. I ran up stairs and the next thing I knew I was in my mothers house that she lives in with my brother and grandmother. I tried to hide on the bed and realized it wasn’t a good enough spot. I got up and crawled on the floor to the closet. I’m the way I saw the cop cars and motor cycles arrive outside the school. I used to hide from abuse growing up in my closet under and behind clothes. In the dream I laid down and covered myself with dirty clothes so that I wasn’t visible. I hid for a long time in the closet until a friend from college showed up. She needed bandages for the gunshot in her hand or leg. I didn’t have any but she laid down and hid in the closet with me. I think I had a panic attack. Finally we heard an announcement from the police that it was safe to come out. I went downstairs and was back in the school. I was in a large room surrounded by other students and friends from when I was in high school. There was a lot of crying and blood. I heard that 3 students had died. I looked down at my phone and thought it was two of my close friends from high school and now. I found my best friend from high school and now as I was sobbing and shaking. She told me the names of who died and that it was a drug deal gone bad. I didn’t know any of them. My tears subsided but my anxiety still caused me to shake. I walked away and my mom picked me up and embraced me. Then I woke up. One of my biggest fears as a teacher in the USA is a school shooting. I think of it every day at school and any noise I hear makes my anxiety spike. This was a horrible nightmare for me.