I have a pain behind my right breast. I don't
Pain medications and evaluation...
From the given details, you have right sided chest pain from the last 2-3 days. The pain worsen with movement of neck as well as breathing. You did not mention any history of injuries, cough, fever and other associated complaints.
This type of pain can either be due to chostochondritis or infection / inflammation involving respiratory system. A physical examination is essential (basis necessity) to confirm the possibility. If necessary a chest x-ray / scan may be necessary.
At this point of time, I will start over the counter antiinflammatory drugs like advil twice a day instead of tylenol. Avoid strenuous exercises. Consider visiting your primary care physician for further evaluation.
Hope this helps. Let me know if you need clarifications.