She improved her best marathon time of 2:43:21 hours the following year and won the silver medal in the 5000 m at the 2007 NACAC Championships in San Salvador.

[1] Romero made her debut on the global stage at the 2009 IAAF World Half Marathon Championships and finished in 39th place.

[2] The following year she ran a marathon best of 2:42:33 hours in León, Mexico before going on to claim the women's gold medal in the event at the 2010 Central American and Caribbean Games.

[2] At the 2011 Central American and Caribbean Championships in Athletics, she won the second regional title of her career, this time taking the 5000 m gold medal.

She completed a distance-double for the host nation, becoming the second woman to ever achieve the feat at the tournament after her fellow Mexican Adriana Fernández.