Spotting during pregnancy week 6

I started spotting at mid week 5 and went for a prenatal checkup at kkh. Did an ultrasound, and everything looks good. Was prescribed some progesterone medicine for 2 weeks. It has been around 1 week and 3 days (currently 7 weeks pregnant) since I have taken the medicine, but I'm still having light pink, but mainly brown discharge. Does anyone have a similar experience and can advise what to do? Should I continue to monitor until I finish the dosage or head back for another visit to the gynae?