T. J. Yates started his second game of the season for the Texans due to Brian Hoyer being out with a concussion. Both teams were held scoreless in the 1st quarter, with the Colts striking first with Matt Hasselbeck connecting with Donte Moncrief for an 11-yard touchdown reception. With Adam Vinatieri making the extra point, Indianapolis lead 7-0 late in the 2nd quarter. The Colts scored again with Vinatieri making a 29-yard field goal, extending their lead to 10-0. The Texans managed to get on the board as the half wined down with a 22-yard field goal from Nick Novak. With Novak's field goal, Houston trailed 3-10 at the half. The Texans' defense held the Colts' offense to zero points in the 2nd half, while Houston's offense scored 13 unanswered points. The Texans made history by beating the Colts in Indianapolis for the first time in franchise history, winning 16-10. Third string quarterback Brandon Weeden helped the Texans past the Colts with an 8-yard pass to Jaelen Strong late in the 4th quarter. With the win, the Texans went to 7-7 and gained sole possession of the AFC South lead. Yates suffered an ACL tear during the game, ending his season.
Question: How many points was Houston trailing by at the half?
Answer: 7