How possible is it to get a prescription for mental health problems?

I’ve struggled on and off with anxiety for about 10/11 years. Whilst I’ve found Propranolol to be the most effective in helping me manage the physical symptoms, I’m struggling majorly, especially recently, to just switch off.

I’ve tried Mirtrazapine and Sertraline in the past but really haven’t got along with them.

Over the last month or two I’ve been really struggling to sleep. I either struggle to drop off, or I wake up in the night and can’t get back to sleep, as the second I wake up my head is just filled with problems it’s trying to create. I’m exhausted and run down all of the time, it’s affecting my work and my home life.

I’ve been thinking about a couple of years ago, I tried recreational cannabis for the first and only time, which I think was a really weak strain that didn’t cause much of a high, but it really just let me chill out. And afterwards I realised that it really helped me just shut off for a few hours, and this is when my anxiety wasn’t as bad.

For the last few days now I’ve been wondering with that experience in mind, if I could perhaps go to the doctors or a private one and maybe get prescribed a dose of it?

I googled it this morning and a few websites said it may be possible if other prescribed medication hasn’t worked.

I’m just wondering if anybody here could maybe shed some light and/or experience with this sort of thing?