Hello, Urgent Care Drs Told Me My D Dimer Was

Hello, urgent care drs told me my d dimer was elevated. I'm having pain under my left breast. I've had an ekg, ct scan, exrays, and blood work. They also told me to get to the ER. I teach and have missed time away from my job, therefore, I decided to wait before going to the ER. Please advise regarding the elevated D-Dimet.