tl;dr - My current med list is below. I am not prescribed Trazodone but have one in my possession. Sleep is absolutely necessary for my mental wellbeing right now but I can't sleep because of a racing mind and hallucinations. Take the trazodone, yes or no? How dangerous is it (I can't seem to find statistics about it but I know they're out there)? Sorry if it's offensive. Thank you. /tl;dr

I'm in the middle of what I'm considering a small-scale mental health crisis. I do not have suicidal tendencies currently (and haven't seriously in some time), I can just feel myself snowballing toward that full blown loss of reality and I want to get a grip on it before it becomes that kind of issue. My head is being unforgivably uncontrollable today, and as is probably a universal feeling here, that really sucks. I'm physically uncomfortable because of my mental state and it's really wearing on me. I'm having auditory hallucinations that are driving me mad. I just really need to go to sleep. But I can't. Because it would be too much to ask for the universe to just let me fall asleep naturally on the day my brain fries. Here's my situation. My current meds are:
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Cymbalta 120 mg/day
Invega 3 mg/day
Trileptal 600 mg/day
Buspar 15 mg/day
Vyvanse 70 mg/day
Adderall 20 mg/day
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I have a 50 mg Trazodone pill that was given to me by a friend. I've only taken trazodone once, and I only took a small piece of a pill (a tiny chipped off corner, it was definitely less than an eighth of the 50 mg) to help me sleep when I was in another episode similar to this (while on the same med regimen). It didn't have much effect except for heavy eyes, and it gave me zero negative side effects. The heavy eyes were nice because it helped trick me into thinking I was getting sleepy and took my mind off of the pretty consistent crying I'd been doing uncontrollably (all day up to that point). I want to try it again. I'm desperate for just a little peace. I've been reading about Trazodone for a few hours now (as much as I can, I can't focus on anything right now I guess- It's taken me probably an hour and a half to get this much of the post typed- I wonder how long the whole post will take) and I'm finding a lot about seratonin syndrome worries. While it's something I've definitely heard of and looked into, I'm still not sure about the actual likelihood of it being an issue. I do not want to press my luck and do any more harm to my body than necessary for sustainability than I've already done, but I absolutely cannot stand these auditory hallucinations in the form of my household white noises (the fan, the dishwasher, the rain outside) all individually, and very clearly, singing different songs that are from my past but that I can vaguely identify (like I don't know the names of the songs or the artists, but I can sing along in my head and recognize them when I hear them- Real songs that were like on the radio like 3-15 years ago) simultaneously anymore. I guess I just need some guidance on this situation. What are my actual risks with taking this medicine only for tonight? Will it kill me? Am I being inappropriate for asking advice on whether or not I should take a drug I'm not actually prescribed? Is this something that's very frowned upon in MI communities? I don't want to come off as someone who's just trying to get a buzz or something. I just want some peace and quiet.

This ended up being way longer than I though and I'm really sorry. If you have any suggestions or guidance, I'll gladly take it. Thank you for reading. (Oh, and it took me about 2.5 hours to finish. Remind me to never write a book.)