I have pain on my left flank that started in the middle of my back. Now it's more on my side and is very uncomfortable. Could it be my gallbladder?
I'm sorry you're experiencing this pain! Pain that is causing you this much discomfort anywhere in the chest area should be evaluated by a doctor as soon as possible. This sounds like it could be cardiac-related, kidney-related, or is an issue with your gastrointestinal tract. Only a doctor will be able to let you know for sure.
Here are some links that you might find helpful as you're tracking down the cause of this pain:
Heart Attack Symptoms in Women
10 Foods to Avoid With Acid Reflux
Music Therapy Can Relieve Pain