Caroline/Hestia.
You are a soldier, as we all are right now, but you are also several other equally important things. And those things don't weaken you as a soldier, so you don't need to fight them off.
Youth is the first thing lost in a war. I lost mine when Sturgis's parents were killed 24 years ago. You have had to cope with so much, Hestia, and grow up so quickly, and this should have never been a fight brought to you and your generation. I'm not an Auror like Gawain, but I'm a cursebreaker and I train and mentor other people to be cursebreakers. I can spot the types who will end up as smashed teacups if they continue in such a high pressure field. So I can tell you that you are not one of them.
You're not broken, Hestia. You just need some rest, and to not be so hard on yourself.
Auror Robards has been doing this for a very long time and you're likely not the first person to have said something in anger to him in a highly stressful situation. If you wish to apologise once things are calmer, he would likely understand.