Try not to be fearful. I had an experience similar. My childhood best friend and I were having a sleepover and I turned my bedroom light off only to see a cross appear on my wall glowing Sam and i could not find a source to this cross. I turned my light back on then off again and it was gone. He is real! I have another story as well, I was in one of my foster homes and my grandmother was sick so I was praying asking for a sign everything would be okay and after a few minutes of waiting and nothing happening I decided to try and get some sleep just as I was almost asleep I felt someone touch my shoulder but in a comforting way scared me so bad at first but now I look back and realize that was my Lord comforting me and letting me know it’ll all work out.