Over the last few months, I had pain in my right breast most of the time, including sharp, stabbing pains when breathing.  This last week my right armpit has a few lumps and now the area above my right collarbone is very very sore to where I can barely lift or move, or lay down
Thanks for your question on Chat Doctor. I can understand your concern. By your history and description, possibility of musculoskeletal pain is more likely. So apply warm water pad on affected areas. Avoid movements causing pain. Avoid heavyweight lifting and strenuous exercise. Avoid sudden jerky movements. Take simple painkiller like paracetamol or ibuprofen. You will mostly improve with all these. If you still don't improve, get done chest x-ray and ECG to rule out lung and heart diseases. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.