Thanks so much everyone for all of your responses.
Since I posted, I've come off the 100mg of Solian and the doctor put me on 25mg of quetiapine/serequel. She mentioned that it might make me very sleepy and said I could take 25mg or 50mg, but to start on 25mg and see how sleepy I am on it.
The first evening I took it it knocked me out. I have been on it 5 days now and immediately once I take it or after 20 minutes I feel sleepy so only take it once I am going to bed.
I feel quite happy on 25mg.. but I can't imagine it is doing anything apart from making me sleep. I don't have sleeping issues unless I have been pyschotic in the past and the voices would keep me awake in terror.
I am happier to take the 25mg than to not be medicated as I am so fearful of the voices returning, plus I find the meds do help with my mood somewhat.
I will try 50mg some night soon when I don't have to be up for work the next morning, in case I sleep out
Thanks for the recommendations for other meds also. I will note these in case there are any side effects from Serequel/Quetiapine in the future.

I hope you all have a beautiful day <3 Stay well x