My sleep paralysis hallucination

Last night, I woke up early in the morning, only to find myself in sleep paralysis. I was about to just go back to sleep, when I heard a clear, male-sounding voice singing something quietly in my ear. This made me so distressed, that I thought it was a serial killer who just broke into my house. It was that terrifying. I Soon broke out of it, and saw that nothing was there. Later that morning, I was having a dream where I was in the doctors office, and as soon as the doctor started talking, I woke up in sleep paralysis and could still hear his voice.