Congratulations! And yay for you for breastfeeding! After my baby was born, I was working on L&D, some 8s and some 12s. I breastfed for 15 months, but stopped pumping after he turned 12 months and could drink whole milk when I was at work. I tried to pump every 3 hours, but it didn't always work out. One of the best things you can do to insure success is to have a really, really good pump. The better the pump, the better your supply will be. I initially rented a Medela pump, but once we had breastfeeding well-established and I knew that I was in it for the long haul, I invested in a Medeal Pump In Style. As for the coworkers, you'd think being in L&D would mean absolute support, but that is absolutely not the case!
In fact, one memorable day, I'd worked 9 hours without being able to pump and I was in active pain due to engorgement. My nurse manager was sitting at the desk doing some paper work, and I asked if she could keep an eye on my patient's monitor strip so I could go pump. She refused. I have never forgiven her for that. One of my coworkers was headed out the door, but threw her bags down and told me to go pump, that she didn't want me uncomfortable and leaking all over the place. She got a nasty look from the manager for that one.
You will usually find that your best support comes from coworkers who breastfed their own babies. I have found that bottle-feeding coworkers tend to get huffy about it, especially after your child is about 6 months old. Maybe they feel guilty? Or maybe they feel like their own choices were being impugned? My pumping brought me a beautiful friendship. There was a nurse on the unit that I could never get along with. We were like oil and water. But, when I came back from maternity leave, I made a point of asking her about her experiences (she had just finished nursing for a year) and she was the one I could always count on to relieve me so I could pump. When she had her next baby, I returned the favor as often as I could, and now we are best friends.
Don't get discouraged, and don't let a lack of support stand in your way. Look up your hospital's policies on breastfeeding, and see what your state law guarantees you. Our policies said I should have a private place to pump that was not a bathroom. I ended up in the locker room all the time, which wasn't very private, but I would sit in the corner with my back to the door, because I never had time to go out to the nearest pump room.
I would pump at home before I left for work.