A.B.
So far what everyone is saying is great. Some other things you might want to try...
1. Eat and drink before you pump.
2. Have a picture or if you're at your computer a video of your baby to watch while you pump.
3. Take the phone off the hook and try to avoid anything that is going to stress you out.
4. Continue with the pump for 5-10 min after you stop getting milk. It might sound strange, but it's giving your breast the needed stimulation to maybe make more.
5. Try some meditation techniques before you start, and focus on the happy times you are with your daughter.
No matter if any of this works or not, you are still doing the best you can for your daughter. You should be proud of yourself and your efforts to give her as much of the very best as you can. It's no small thing to work and pump and do all the other things moms are expected to do. You should congratulate yourself for getting this far!