I think it's great if you can keep breastfeeding & you're so lucky that the childcare is in your building, you're always close by if dd needs you & you can still have some special moments during the day with her. I would personally space the days out because I know with my dd 2 days in a row of being out of sorts can make the next day alot harder but it's not as bad if it's just 1 day.
Good luck with going back to work