Eye movement desensitization and reprocessing (EMDR) is a common type of therapy for people with PTSD. It helped me a ton, but I need to do it again for trauma that was only recently uncovered. You may still have to deal with pieces of it forever, but the goal with EMDR (and trauma-based therapy in general) is that you'll be able to remember it without it crippling you. You can't be suicidal going into EMDR though, so working with a therapist and/or psychiatrist beforehand to reduce any of those thoughts would have to happen first.
IMO, it's absolutely worth it to give it a shot. If it doesn't work out, you have a backup plan, and if it does, then you'll be glad you took the first step. I'm here if you have questions about EMDR, I'm not a professional but I've been through it.