What can you do if you have COPD and its affecting tour heart? Can it be fixed?

Yes. Yes if pcp us not familiar with COPD , see a pulmologust, you may also need to see cardiology.
Incurable... Unfortunately, COPD is a slowly progressive and incurable disease. It can affect the heart by increasing vascular pressure in the lungs which results in the heart having to work harder to pump blood into the lungs. If your oxygen level is low enough to warrant supplemental oxygen, you need to wear your oxygen all the time. Smoking cessation is absolutely necessary, if you still smoke.