A few months ago, my husband wanted to drive a particular track, taking us past the scene of the rape. Obviously I couldn't tell him not to.
The word 'obviously' is always a clue that things might not actually be obvious.
You seem to understand that your husband wasn't at fault, your decision not to disrupt his plans shows that you care about his feelings. You don't display the same sensitivity towards your own feelings.
If he cares about your feelings (that he married you is hopefully a clue), then I don't think he would want to remind you of the rape. I suspect that if he had known that seeing that place would upset you, he would have considered changing plans.
But I couldn't make a fuss by telling anyone because it was my fault for this.
I agree that it wasn't his fault. That doesn't make it your fault. I think that sufferers, in general, are not good at allocating blame - we tend to find one thing, and put all the blame there. It tends to be that we blame a part of ourselves, and dissociate from it. (In my opinion, that's how PTSD and other forms of trauma-induced dissociation work.)
There are people who obnoxiously refuse to be triggered, who say "You can't do that! It triggers me!" and they act like the world owes them something because they have feelings. A lot of the time here, we talk about that particular breed of asshole, and try to discourage sufferers from being assholes. But the opposite extreme isn't good either, and I think you may have pushed yourself a bit too hard when trying to be considerate this time around.
I didn't look any different, and because I wasn't in touch with any of it at the time, I don't think it extended the Window of Tolerance.
I agree. The Window of Tolerance expands when you experience a stress (including the stress of a trigger), but you end up feeling (and being) safe. It doesn't sound like you felt safe. Although, as I type that, I feel doubtful - perhaps a week of feeling sick is a better outcome than previous outcomes for a similar stress? Hard to tell. It definitely sounds unsatisfying.
And, perhaps processing the memory of 'that time my husband took me near the place where the rape happened' is going to be good practice. It seems like a memory that would be less stressful than other things you might remember.
I really like 'Window of Tolerance' as a concept, thanks for introducing me to it. I think that the thing that stages 1, 2 and 3 of the structural dissociation process have in common is that they all involve widening that window. First you widen it enough so that you can endure the things you can't avoid in order to survive, and then you start widening it to the things that happened in the past.
One thing that can be very difficult to tolerate is that sometimes, we're not feeling strong or safe enough to do the really hard work of dealing with the really hard stuff. If that's something that doesn't fit into your current window of tolerance, then it could be good practice for getting a wider window :)