Jordana Brewster thinks motherhood has turned her into a ''hypochondriac''.

The 33-year-old actress is currently filming her hit show 'Dallas', but she admits she rarely takes her six-month-old son Julian - whom she welcomed via surrogate - to the set with her because becoming a parent has made her more aware of the potential dangers.

She said: ''I didn't realise I'd be such a hypochondriac as a mum. It's flu season in Texas, so I haven't taken him out that much on set.

''But we've been travelling back and forth a lot. He's a really good traveller.''

Despite her busy schedule, the brunette beauty insists she still gets to watch the tiny tot grow and adapt to new things.

She explained: ''This [six months old] is my favourite age, of course, because he's responding so much.''

She added: ''He's rolling over. He's smiling. He's laughing.''

However, Jordana - who is married to film producer Andrew Form - finds juggling her busy schedule and caring for her new baby tiring, so she's got into the habit of going to bed early.

She told Wonderwall magazine: ''I'm such a nerd, especially now that I have a baby. I'm in bed by 9 pm. I'm not kidding. By 7 [am.] when I'm getting my make-up done, I need to get the energy up. I usually need an espresso shot.''