What would cause a sudden constant sharp tightening pain that is on both sides of my middle to upper back and around front under my rib cage. Deep breaths make it worse.
The worstcase scenario is that you could have pneumonia (lung infection) or a pleural effusion (water on the lung). Thus, you need to see a doctor to make sure that this problem is not life-threatening. Any time you have pain like this that is sudden onset or that interferes with your daily living to this extent, you should always seek the help of a doctor right away. I hope you're feeling better soon!
Here are some links that might be useful right now:
The Truth About Antibiotics: Myth vs. Facts
Using Tylenol Responsibly
Let’s Talk Pain Meds
Dr. Christina Lasich, MD