Unless you *have* to start working now, I would hold off a little if I were you (unless it were just part-time). She is so young & it is natural to feel anxiety leaving her, especially at this age. With my 1st (girl), I got 8 weeks maternity leave due to a c-section, and I literally cried at some point every single day for the first year. I *hated* not being with her during the day. It was torture & it took forever to get "better". I don't even think it did get much better, I just cried myself out ;-)
With my 2nd (boy), I eased back into it, going back 2 days, then 3, then 5. It still sucked but surprisingly I didn't cry. I think that was only because I had a plan to go part-time after @ 6 months. 6 weeks of full-time left, and my heart still aches when I send them out the door to the sitters, I want to be the one spending the day with them!
Anyway, my point is give it some careful thought. If you just want to get out of the house and/or have to work, that is understandable. Just keep reminding yourself that it is much harder on you than her. Make sure you find a great caregiver & know that your daughter will really have no memory of you not being there as much the first few years of her life. Focus on the time you do get to spend with her and don't worry about cooking, cleaning, etc. It is really quality over quantity in the end! Good luck, I hope it is much easier on you than it was on me ;-)