[Edward]

You shouldn't pursue employers who devalue interviewees in such a manner. If this is how they treat interviewees, then you'd probably have it worse when you're on the job.

You're probably right, though. It could be discrimination. If you had a breakdown and they were well-aware of it, then to a point, I can understand why they declined to interview you. However, that itself says a lot about the employer: They won't be completely honest with you down the road. Regardless of what happened, they should have:

1. Privately informed you that they cannot consider you due to your past, and/or
2. Interviewed you based solely on your merit, and overlooking your past.

Is the interviewer the head honcho? Is there anyone above her? If yes, you should try to get in touch with her superior(s) and explain what happened. Personally, I wouldn't pursue that job any further, but if you must, then you can start by doing the above.

Good luck!