Are you sure she's still at that agency? After 13 years, I'd wonder if she might have moved on? That said... I think all you can do is ask. Some people have great memories, some... not so much. If you were one of her first, and saw her for three years... it wouldn't surprise me at all if she DOES remember you,but may not recall the details you're looking for. At least by asking, you can (hopefully) get some resolution and not need to continue wondering if she has an answer for you.

*Good luck!*