After three stents my cardiologist put me on Brilinta 90mg 2x daily with low dose aspirin in the AM taking. After a little over 2 1/2 years I have had minor bleeding problems but have now commenced have shortness of breath problems. This prevents most any form of exercise (walking distance) or other activity. My cardiologist indicated that this usually happens short time after taking the medication. Is it ever safe to terminate the medication after continued usage for almost 3 years?