The 29-year-old from Henley was awarded the honour by the Queen after winning the Olympic medal in the 3,000 metres individual pursuit cycling event at the Beijing Games last year.
She had only taken up cycling in 2004 after claiming an Olympic silver medal as a member of Britain's quadruple sculls in rowing.
Romero is currently taking a sabbatical from cycling and is not competing in the World Championships, currently taking place in Poznan.
She said: "Like the door of fate which opened up to me when I walked into rowing and the same with cycling, if that ever happened with another sport then I would weigh it all up and see.
"But I think I pushed my luck at two and the probability of being successful in a third is extremely low.
"If it did so happen that I tried something else and had the same possibility in a new sport then I wouldn't turn down trying to make myself an Olympic legend - who wouldn't want to do that?"
Romero said she was humbled to have been recognised by the Queen.
She said; "To have recognition across the whole of the country and to be honoured and receive an MBE for my achievements really brings them home to me.
"I'm lucky that what I've been working towards and everything I've wanted to achieve is something the rest of the country can share.
"Everybody here, nobody knows anything about their achievements, they've worked just as hard with just as much determination to do what they do."
Paralympic tandem rider Anthony Kappes, who won gold medals with cycling partner Barney Storey in the 1km time-trial and sprint, was also appointed an MBE for services to disabled sport.
Kappes, 36, of Manchester but originally from Buxton, Derbyshire, said: "This is a special day. I'm really proud to receive it and proud of what it represents and I'm glad my family and friends can be here to see me receive it.
"It is as much for those people as it is for me."
