I saw an ER physician Sunday at 3:00 AM for upper right back pain with some radiation to upper right chest. Chest X-Ray, front and side view, lab panel including a d dimer, troponin, and other labs, EKG, with no negative results. Physician prescribed naproxen 250 and Zantac twice daily. Back pain reduced but still feel upper right chest minimal discomfort. Did have a clot last May, took xarelto for 6 months and now on baby aspirin 81mg daily. Your thoughts are appreciated.