My memories, if there are any at all, don't come up if I force them, but only when I feel safe. So yes, I think better to work on with a therapist and have safety in place first...for most of us, the body will hold those memories locked away until it senses safety. I'm sorry I don't know any other techniques. I have bits of stuff, even if mostly representational, that come to me in dreams, which I can't help. But what I need more is the feeling okay in my body right now than details of memories...though I totally understand just wanting them now and assuming that clarity will end all of my struggles.
Sorry if my response sucks...you can disregard. But I'm sorry you're struggling and fed up, I can relate to that. I get really impatient sometimes and want my life to be different...now... For making sense of some stuff in a semi-safe way, outside of therapy, artwork is sometimes helpful for me (no trauma details come up, but I get a feeling for the age I am partially stuck at sometimes, the mess between me and my surroundings, etc)...but I often need someone to share it with or talk about it with if it will be useful.
I know it's not what you want to hear but last thing I want to do (or would recommend to anyone) when feeling "helpless" is try to dig up terrible, traumatic stuff from the past. What is the helplessness about? How do you think uncovering memories right now, alone, will help you feel more empowered? Do you have support right where you are if memories come up? Do you feel safe? How are you fed up...are you angry at yourself or impatient about recovery? (sorry for so many questions...you can answer or not...just some things I wondered as I read your note). Hugs...