It's been a while since I've touched base here. I now have two children and trying to balance that between home, work, marriage. I'm better at it but learning every day.
Amy, being a first time mom is really hard. I remember missing my first daughter terribly the entire first year. Honestly, I miss her every day but it does get easier. I did do some things that helped minimize the draw backs of working outside of the home. I setup a webcam in my office and skyped with her and her caretaker. Eventually, I upgraded both of us to iPhones and used Facetime to video chat. When I couldn't video chat, I would call and talk to her over the phone just so she could hear my voice and I could hear her coos. Honestly, I wanted to make sure she remembered and missed me. My biggest fear was her not feeling connected to me and being more connected to her caretaker. I can assure you, now that my daughter is almost 4 and having a 6 month old, that that hasn't happened. If you're loving and attentive when you're with her, however brief that time is, it's all she needs to bond with you.
Also, I found it helpful to explain to her caretakers that I'll call a few times during the day just to connect with her. Sometimes they feel like I'm checking up on them (although, sometimes I am; can't help it) so clarifying this up front is helpful. And note, that all of my caretakers until recently have been family members (brother, sister, sister-in-law, mother-in-law, daddy). Likewise, there were days where I couldn't stop to call or anything because I was simply too busy at work. It happens.
Hope this is helpful. Good luck and hang in there!