I have CPTSD, along with that comes insomnia, and I’m prescribed Quetiapine for sleep - without it I’ve got no chance so I can understand how you feel. Go back to your Doctor, or whoever it is that prescribed them for you and be firm.
You are the patient, its your body and you know what works for you, if you are now struggling when previously you were ok with the medication then advocate for yourself, or bring a trusted person along to support you. Keep making appointments until you are listened to - unfortunately many doctors especially in mental health don’t have up to date knowledge and follow guidelines and tick box charts to diagnose and treat rather than noticing the person/patient in front of them.
Take notes with you, ask for your summary care records and explain how being without the meds is affecting you, and ask for a second opinion if needed. And then a third.
Our health are system in the UK is shocking, and very hit and miss depending on who’s treating you, it really can come down to who’s sitting in the chair that day. Although there are some wonderful humans that work in the NHS, I’m not tarring all with the same brush, but with the pressures and cracks in a failing service you really need to make yourself heard.
I would say that it is a clear clinical need if you were settled before and now you are struggling, it doesn’t sound as if you’re ‘just wanting them’ ignore that kind of drivel from others, too many people have lost their lives and or loved ones from just accepting what ‘medical professionals’ say because of an outdated degree and guidelines on a website.
Coming from someone who has had to advocate for herself and her child who would not be here today had I followed a GP and A and E consultant’s advice.
Good luck 🤞