The Five of Pentacles can, depending on the rest of your spread, refer to financial matters, employment, or relationships. Unfortunately, it is a negative indicator for all of them, suggesting duplicity, loss of jobs, and the possibility of infidelity. This is a time for you to carefully evaluate what matters in your life and work out your priorities, such as whether your job or your relationship matters most. In order to mitigate the damage in some areas of your life, you may have to let some of the others fall away.
To get the full traditional meaning and interpreation of Five Of Pentacles, I suggest you visit Trusted Tarot and their Five Of Pentacles page.