I am so sorry you are feeling so down today Liz.
I am not of the school of thought that everything has to revisited to be worked through. My RAH saw a therapist at one point that straightforward felt that spending a lot of time on the past was a waste of the present. I am no therapist - but perhaps you have visited your past enough? I think the place that you are in while uncomfortable is very pivotal - it sounds like you are ready for......something else.
Ultimately not all decisions are made feeling 100% right. Sometimes you just have to jump.
Be kind to yourself today - ((((hugs)))).