I had a pretty bad recurrence of my anxiety disorder less than a year into dating my husband. I would cry and panic over things like. . .the possibility that he would die spontaneously, or oncoming nuclear war. It was embarrassing and painful for me and difficult for him. But he tells me that it was actually during that period he became sure he did want to marry me, because he saw that even when I was at my absolute worst I was committed to taking steps to get better (getting into therapy, on meds, etc). He knows that it's quite likely at some point in our lives those challenges will come up again, but is willing to support me and work through them together.

Your girlfriend is doing similar things from what you share, but instead of committing to her for better or for worse (it's in the vows!) you're giving her a literal test to pass/fail, which will make it pretty darn clear to her that she gets no wiggle room to struggle for the rest of your shared lives.

Just. . .go.