19/F/5'1/115lbs/white & hispanic/I don't smoke or do drugs or drink/no meds

I have had vivid dreams all of my life, and during times of higher stress, they turn into nightmares. Some years, they are mostly nightmares. This is one of those years for probably obvious reasons, lol. Anyways, I've been diagnosed with OCD, anxiety, and depression, and my OCD is very bad right now. I have started worrying excessively about someone killing me in my sleep (I have had this worry my whole life that someone will break in and kill my whole family) and I know it's not logical, but I am too afraid to sleep until I'm too exhausted to stay awake, and then even when I do sleep, I am dreaming of getting murdered. I also have been seeing people and hearing voices right when I wake up from a nightmare. Is there any way to fix this? The nightmares were like this even before the worrying got this bad. (I have a therapist, but they are on break right now, and no professional I have seen has given any helpful advice because I don't think they get it). My psych and therapist suggested melatonin but I've heard it makes nightmares worse? What should I do? (I've tried 5 antidepressants, but have had side effects of all of them, and I still have hives from an allergic reaction to Wellbutrin from a little bit ago) Anyways I'm just exhausted and scared please help