Cough, fatigue, shortness breath (one flight of stairs +60% heart rate), wheezing/rattling right lung only, slight pains in left rib and right back?

Go get evaluated. If you are feeling so bad with wheezing and you can tell the side of rattling of lung, you could have a pneumonia. It is best for you to be evaluated, go to er or urgent care so you can be treated appropriately.