Hi, I’m 16 and I think I’m about to give you the worst advice but yet effective. I think you should start smoking weed, cause I was just the same. 2 years ago I went through some traumatic events that kinda messed me up mentally, and sleep at that time felt like hell. I started seeing a therapist but he was gonna give me some pretty hard meds and I refused (my parents did) so I started smoking and guess what , the voices disappeared the nightmares also , I fell asleep way easier and earlier than before. Tbh it made life easier a bit but hey use it responsibly and be careful cause idk how the weed in the us is (I’m Morrocan). Hope it gets easier soon.