Encyclopedia of the Unusual and Unexplained :: Religious Phenomena
Guardian Angels
The rest of the research on this is basically figurative typology ( apparitions of the virgin Mary, Alien beings/ UFO phenomena, guardian angels, etc.) Not worth delving into. How many blonde haired blue eyes in your immediate circle, on TV, in the movies, the news, at school, in the neighborhood and etc. - Archetypes.
Get your rest, attend to your studies, shut down excess stimulation (TV, Youtube, movies etc) and add in biblical study, inspirational devotional reading (less Steven King novel's) and meditative, contemplative prayer (which is an art unto itself). I know you have school and friend interests, volleyball etc. So prioritize and guard your time and guard your heart. You can meet your social interests in positive, healthy ways with prior thought.
Some ideas - ask around ... Have been helpful for middle schoolers to college students ...
and etc. From your public or school library, church, civic organizations or by asking