The good news is that right NOW, you don't need to supplement. Even if you did want to give a feeding to your husband to give in a bottle, you'd still need to pump at that time to maintain your supply. So there really isn't any "help" in the sense of more sleep. Nursing (which is much more efficient) or pumping, you're up anyway. Once you get the pump, you'll be able to bottle feed breast milk which is superior in every way. Since you're not having any issues, why not choose to give your baby the best for as long as possible?
The lack of sleep won't affect your health. I promise. If it did, Momma's of all time, all over the world would be sick. The biggest help is having things organized so that you can get back to sleep. If you're changing diapers during night feeds, have DH do them. It gives you a few more minutes to sleep/wake/get your wits about you.
The best way to catch up on your sleep is to nap with your baby during the day. So you're not getting the 8 hours of sleep you once were, all at once. But you will get it throughout the day.
As for pumping at work, it can't hurt to ask. They might surprise you. Even if you can't pump as often as you'd like, some pumping is better than none.