I have blood when I blow my nose, head & neck pressure, shortness of breath, chest & back discomfort I don't smoke, blood tests are normal. Help?

Blood in the nose. It could be epistaxis. Some times dry nose could cause blood stains when you blow your nose. Common allergies could cause dry nose.
Multiple causes. If you are still experiencing shortness of breath, it is advisable to seek medical care. Your physician may order a chest radiograph, pulmonary tests and a blood count. A slight amount of blood when blowing your nose may be due to local irritation, Motrin use or inflammation. Nasal saline drops help to alleviate these causes. The bleeding should stop quickly in this case.