Sabar ye mama, spotting coklat after Duphaston is quite common, it doesn't always mean something is wrong, tapi sebab you're at 8 weeks, definitely inform your doctor about this bila next checkup or boleh call clinic je to be safe. A few of us in our mum group went through similar and doctor's advice was reassuring, but everyone's situation is different so best get your own doctor's peace of mind lah!