Should I inject again?

I injected 10 mg BpC 157 and 5 mgt b 500. After that the pain was gone. But 3 days later the pain was back. So it did reduce the pain temporarily. Now I'm not sure if I should inject myself again or not because I'm worried the pain might come back again. Some people told me that I didn't inject enough. I want the pain to be gone forever and for my elbow to heal completely.