Yes, oxygen and inhalers are commonly used. Be sure you've had all of your tests and follow the safety rules. There are things people with COPD can do to improve their breathing. And for the most part, things like exercise, pulmonary rehabilitation, and smoking cessation can be very helpful, even for those with little lung capacity. Here's a list if 11 breathing tips. http://www.webmd.com/lung/copd/features/copd-breathing-tips
I hope this helps. It's not easy to have chronic issues. Good luck to you.