Hi. I m 39 yr old female, smoker. I have severe pain under my right armpit, and the pain is in right shoulder blades as well. This pain started approximately 7 days ago.No chest pain, no wheezing, no blurred vision or headache. 2 weeks ago, my Dr. switched me from 10mg oxycodone to percocet 7.5-325. Could this be an allergic reaction to the Tylenol? Thank you in advance.