No longer high income but erigeron, I'm thinking that if you think you'll be better off with full time work, then don't feel bad about wanting it. Physically being there for your little girl isn't the only way to show her you love her.. ensuring her future is secure by being financially sound, is also just as loving.
I don't really want to work full-time, though, that's the thing. Currently I float which means I work whatever location and day is necessary. I never know what my schedule will be in advance and it drives me crazy... depending on how on the ball the schedulers are I might know anywhere from a day to a month in advance. I have certain days blocked off since I'm only part-time, and I have a fixed weekend schedule. Other than that I can't plan ahead for anything. If I went full-time it would be that only more so, up until such time as I got a permanent assignment, which could take God knows how long. Or I could look for a different job, which might be marginally better. But really I don't want to work full-time. I enjoy the extra time at home to get stuff done, relax, play, have play dates... But I know it's not the smartest approach financially.
I want to enjoy my life though. Not have it be just a giant slog towards debt repayment. If I chose to work more right now that's what it would feel like; I've worked more during the summer when my husband is working less, and the schedule drives me bonkers.