M.S.
Do it!!!! Go back now... I was so lucky to have my Dad watching my son until this week. Now that I have to pay for childcare, I had to quit one of my jobs because I couldn't afford childcare and the late (non-traditional) hours... I'm trying so hard to finish my dissertation and a 2nd master's degree and I have no time... I stay up all hours of the night trying to get it done. Also- You are guaranteed a career and a way to provide for your child if you finish. You definitely need to finish.
You are absolutely doing the right thing. You will be so glad you did this while you had loving, trusting, and affordable help for your daughter.
You may want to try to get her used to a bottle... It's good survival skills to be able to do both........ You can always pump or mix half formula/half breastmilk if you don't produce as much pumping. Also, for baby food, she may like that Nuby spoon/bottle contraption that lets you dispense food similar to a bottle or breast. (My son got really annoyed at first that food didn't automatically dispense off the spoon... ha ha... that helped)
I completely understand how you feel. I was home with my son every single day until he was about 1 year old. I was traveling 2 days a week to work and teach a few days in my home. You feel guilty for every second you're away, but they will be perfectly fine. You'll be surprised how much they learn from others (every time I picked my son up my Dad taught him something... how to walk..........how to use a radio-controlled car! Ha ha!)
About the lovey- my son was the same way until about 15-16 months... In fact I'm reading that 17 months is when they really start attaching to a lovey. He wasn't attached to anything (but me) until last month, he saw Curious George and decided that was his new lovey... He can't get enough of him now.
Good luck! You can do this and will be a better Mom for it.