A.S.
10 weeks old is way to young to get her on a schedule, in my opinion. You can try, but you'll drive yourself crazy. You can set up a "routine," but you have to be flexible. Their needs are ever changing. Try to let her establish her own schedule, working from her cues, and work from there. My guess will be that once you go back to work, things will have to be more structured, and you can work from there. However, don't expect her to be in compliance with your schedule. And as for sleeping through the night... this is a major milestone that most babies don't reach until around or after 6 months. I have a friend with a 2 year old that still doesn't sleep through the night. I hate to be a downer... but just trying to be realistic.
You can try bumping up the amount she eats before bed. Increase the frequency and/or the amount. Babies like to "tank up" before bedtime. We always found that the better our daughter nursed before bedtime, the better she slept at night. We were lucky enough to have her sleep through the night at about 3 months old. Just in time for teething to start, and then it was all shot all over again! =p
I'd recommend feeding her before you leave for work in the morning, that way you get some quality time with her before you leave. Then let the sitter feed her the rest of the day.
Try not to stress about it too much. Good luck!