You know exactly who the information was mistakenly sent to, and it was one person (assuming the wrong email address was a good address), so there's not much reason to panic. One good preventative move would be to put a "fraud alert" on your credit report - please see the link below. if there's a charge for this, ask the title company that made the mistake to pay for it.
Disclaimer: Please note that this answer does not constitute legal advice, and should not be relied on, since each state has different laws, each situation is fact specific, and it is impossible to evaluate a legal problem without a comprehensive consultation and review of all the facts and documents at issue. This answer does not create an attorney-client relationship.