If you DO NOT have the home listed with an agent, and it is not in the MLS... You will need to contact Trulia to get it up on the site.
I would indeed contact your agent immediately.
Your real estate agent should be able to help you with that. It appears Mary Alice Ramirez of Kuper Sotheby's is your agent. The MLS number for your listing is 944040. She should be ensuring your home is marketed all over the Internet so you should contact her. Good Luck!
Darrell D. Drouillard
Home Team of America
16719 Huebner Rd., Bldg 4
San Antonio, Texas 78248
'Serving all Your Real Estate Needs'