Hi T.!
Such good advice from so many people! I just want to chime in and say that it sounds like you are doing such a great job and trying to give your baby what's best for her! Make sure to eat as much as you want (the next year is NOT the time to diet) of healthy (and some treats, too!) foods and drink tons of water.
I know you're tired and it's really hard to function while feeling that way. I definitely remember those days. Are you trying to feed her in the side-lying position at night? If you can learn that position, you may be able to nurse her and doze. It's not as good as full-blown sleep, but it's better than sitting up a bunch of times a night. Also, like your doctor says, she will grow out of this stage, and while it seems like it's going on forever, it won't.
Right now anything you pump out is bonus milk, because you are feeding full time and she's happy and getting what she needs. Remember that once you return to work, all you need to pump out in a day is what she will eat in that day. I pumped with both my children until they were slightly over a year, and I never got much more than two ounces from each breast, sometimes much less, especially from one side. I had friends who could pump out four ounces from each side with ease, but I never could. Some women make more milk, some women make less milk, but if you are rested, hydrated, and healthy, you should be able to make the amount your baby needs.
Another thing to consider: your baby can get the milk out much more effectively than any pump. Do you have a good quality electric pump? It's worth the 300 or 400 dollars to invest in a really high-quality pump. I had a Medela and a lot of people like Ameda also. One of my friends loved the hands-free Medela Freestyle.
Finally, don't forget that your baby goes to your breast not just for nutrition, but also for comfort. The more you provide for her oral needs now, the better for her in the long run. You may find that she has a need to suck that extends beyond her need to feed. You're not just feeding her when you nurse, but mothering her at the breast.
Your husband sounds so supportive! Take him up on all of his offers to do chores, and also to comfort your baby if she's waking, but doesn't really need to eat. Sometimes a dad can rock, dance, sing to, or wear a baby and lull them back to sleep, allowing mom to sleep a little more.
Good luck to you, and congratulations on providing your baby with such a wonderful, loving start!