The 'Mad Men' actress - who raises three-year-old Xander alone - admits juggling her personal and professional life is a ''challenge'' and she is ready to make sacrifices when she needs to.
She said: ''It's a challenge but I'm not the only mother dealing with it.
''I manage and make sacrifices.
''I was supposed to go to the Smithsonian museum to meet the US president, but I couldn't go because my kid was sick.''
Despite being content with her life, the 37-year-old beauty still wants to ''do better''.
''I want to be happy and I want to be a good mum but I'm also a fairly ambitious person. I want to accomplish things in life. I always have this urge to want to do better.''
Since beginning her career on 'Mad Men', January thinks she has become a much better person.
She told Britain's OK! magazine: ''I've become a better person and becoming a mother has opened up a whole new world to me.
''I feel like I've become a better friend too.
''When you do a TV show for so long, you live in a bubble so I've learned to value real relationships. I've been blessed. I have no complaints really.''
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