I feel like I am daily (hourly, all the time) having to choose each word and action perfectly.
i feel you on this.
cut yourself a little slack. its going to happen.
one member here put it a bit like this: think more in terms of long term fire prevention than running around putting out every fire.
you have a highly sensitive partner. youre going to say the wrong thing. if you are working toward building the core foundations of your relationship, saying the wrong thing will make for a bad night, rather than the end of your relationship.
im being a little bit facetious when i say that, but you love someone difficult who will make a mountain of a mole hill, and if youre in this relationship, you have to have realistic expectations that they will handle mountains and mole hills badly, but it doesnt have to be dooming.
one thing that jumps out at me:
she is struggling mightily over her breakup with her ex husband, and it is ongoing.
putting things in perspective, anyone would. there are so many things that a divorce triggers. there is a significant loss to grieve. there are, quite frequently, deep feelings of failure. often, there is shame.
you love someone with a particular worldview, with a particular view of herself, and who is prone to low self esteem and castastrophizing things. these things will be in overdrive for her, coming out of a divorce.
she almost certainly has doubts about you. doubts about herself. doubts about the relationship and its ending, why it ended. regrets.
part of that is not your battle, but something you really need to understand you are contending with nonetheless.
dont get in a competition you didnt sign up for as if to prove to her you arent her ex. be you (with tools). give her the space to grieve things and work through her battle.