Rear ending someone in traffic but no insurance was traded.?

[BrianChing]

i was driving a delivery truck in traffic when i rear ended someone. the lady got out and inspected her car, but she got back in and kept driving because there was no damage. but half a mile later, she pulled up next to me and said she copied my license plate number, company name etc. but she didn't get my insurance. i also didn't get any of her information because she just drove off. and i didn't get any pictures of her car
my question is: what can she do to me? can she claim my insurance? can she sue me?
please help. thanks