I've had hypnotherapy but for insomnia/depression, before recovering trauma memories. I can speak from my own experience of trauma, healing and alternative therapies, but of course someone else may have a completely different view.
I had a very positive experience with one hypnotherapist, but I wouldn't have hypnotherapy for PTSD symptoms. I'm much too careful about what's going on with my mind. If you think about how talk therapy can be upsetting or even retraumatising, imagine the risk having a therapy that works directly with your subconscious. Even a good hypnotherapist probably wouldn't have nearly enough understanding of trauma and what sort of level of psychic safety is needed for a trauma survivor.
Your symptoms are not separate from the issues causing them, and I don't believe that you can address them on a deeper level like this without touching/uncovering/disturbing some fundamental trauma. So it's not something I would imagine would reduce your symptoms - possibly just the opposite.
What I would definitely recommend considering, though, is guided meditation/visualisation. I've needed to be very careful with these, because I'm still working with the Pandora's box that is my mind. I'm much more in control of it, though, and in fact I use these techniques mostly for psychic protection, safety and grounding. That in itself has helped me greatly with talk therapy, because I'm stronger and feel safer and have more coping resources. I've found a recorded guided meditation that's very soothing for me, so that reduces symptoms like anxiety and distress.
I do think it's good to have something alongside talk therapy which is not just me doing all the work, and I saw a somatic trauma therapist for about a year as well as having counselling. It worked really well to have the two therapies together, and both my therapists felt that too. I have to say, though, that it wasn't something that immediately reduced my symptoms, and sometimes it was hard going, but it quickly released a lot of trauma energy that otherwise I'd have been spending a long time working through in talk therapy.
I can understand wanting help reducing your symptoms, but I think finding and using your own self-soothing and strengthening techniques is the best way to do it. For trauma, the only type of therapist I'd see is a specialist trauma/somatic therapist.
